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When sarcomeres contract, they generate force (tension). However, the amount of force generated depends on the sarcomere length and the amount of thick and thin filament overlap. Below is a figure that details the forcegenerating properties of a single sarcomere. […]

Recent studies have shown that the onset of puberty in American girls has decreased from an average of 12-13 years of age to as young as 8-10. Many scientists who study premature puberty suggest that steroids in our food and […]

The main function of the rough endoplasmic reticulum is the production of A) mitochondria and proteins secreted by the cell. B) hydrogen peroxide and steroid hormones secreted by the cell. C) ribosomes and steroid hormones. D) membrane and proteins secreted […]

Sometime after a human baby is born, the expression of fetal hemoglobin ceases and the expression of adult hemoglobin begins. Imagine that a baby is born and this switch from fetal to adult hemoglobin does not occur. In which part […]

Which of the following statements best describes the molecular basis of muscle shortening? A) Individual filamentous proteins contract. B) Individual filamentous proteins shorten by coiling. C) Rod-shaped protein polymers shorten by losing subunits from their ends. D) Protein filaments crawl […]

Which of the following statements about the ATP molecule is true? A) It contains five phosphate groups. B) Extremely stable bonds link the second and third phosphate groups. C) It contains the sugar glucose. D) It releases energy when one […]

The greatest challenge facing the zoned reserve systems of Costa Rica is A) high predation by jaguars. B) forest fires. C) soil erosion. D) the growing human population. Antigens can be A) proteins. B) large polysaccharides that protrude from virus […]

Skeletal muscles A) are found in and around internal organs. B) get longer when they contract. C) work in antagonistic pairs. D) push on bones to make them move. A molecule that is detected by our sense of smell first […]

The graph below shows records of temperature (light gray line) and CO2 (dark gray line) over the past 1,000 years. CO2 is recorded in parts per million (ppm). If you focus on the data from the mid-1900s (indicated by the […]

A buffer A) is an acid that is used to offset overly basic conditions in the body. B) is a base that is used to offset overly acidic conditions in the body. C) donates H+ ions when conditions become too […]

Cigarette smoking can sometimes lead to development of a ‘smoker’s cough,” which results from paralysis of cilia in the airways. Why would the paralysis of cilia lead to smoker’s cough? A) Paralyzed cilia can no longer clear the airways of […]

Which of the following statements regarding plasmodesmata is false? A) Plasmodesmata penetrate plant cell walls. B) Plasmodesmata carry chemical messages between plant cells. C) Plasmodesmata carry nutrients between plant cells. D) Plasmodesmata are found in plants as well as some […]

Which of the following statements regarding genetic testing is false? A) Genetic testing before birth requires the collection of fetal cells. B) Carrier testing helps determine whether a person carries a potentially harmful disorder. C) The screening of newborns can […]

Which of the following groups has a series of similar segments that make up most of the body? A) millipedes B) crustaceans C) scorpions D) insects Which of the following statements about tropical forests is true? A) Tropical forests occur […]

Which of the following statements would Darwin have disagreed with? A) Species change over time. B) Living species have arisen from earlier life-forms. C) Descent with modification occurs through inheritance of acquired characteristics. D) Descent with modification occurs by natural […]

Thirty people are selected for a long-term mission to colonize a planet many light-years away from Earth. The mission is successful, and the population rapidly grows to several hundred individuals. However, certain genetic diseases are unusually common in this group, […]

In 2011, scientists investigated whether the salts that are spread on icy roads to melt the ice are diluted enough by spring rainfall so that they do not have negative effects on amphibian species that breed in nearby areas. They […]

A packet of light energy is called a A) quantum. B) pigment. C) photon. D) phaser. If you close your eyes, hold your hands over your eyes for a short time, and then uncover your eyes, your pupils will be […]

If an ecosystem has a carrying capacity of 1,000 individuals for a given species and 2,000 individuals of that species are present, we can predict that the population A) size will remain at equilibrium. B) size will decrease. C) will […]

In which part of the human female reproductive system does fertilization normally take place? A) part A B) part B C) part C D) part D Which of the following organisms has a gastrovascular cavity? A) hydra B) earthworm C) […]

The relationship between spinal nerves and the spinal cord is most like the relationship between A) the hairs on a person’s head. B) the vertical and horizontal threads woven together to form a piece of cloth. C) an interstate highway […]

In an average ecosystem, about how much energy is present in the organisms at a given trophic level compared to the organisms at the next higher trophic level? A) a tenth as much B) half as much C) twice as […]

Which of the following statements regarding freshwater fish is true? A) Freshwater fish frequently drink to obtain salt ions. B) Freshwater fish use their gills to actively take up salt ions. C) Freshwater fish lose water through their gills by […]

Which of the following statements is not consistent with Darwin’s theory of natural selection? A) Individuals in a population exhibit variations, some of which are passed from parents to offspring. B) Individual organisms experience genetic change during their life spans […]

What is the fundamental difference between covalent and ionic bonding? A) In a covalent bond, the partners share a pair of electrons; in an ionic bond, one partner accepts electrons from the other. B) In covalent bonding, both partners end […]

The essential amino acids A) must be obtained from the food we eat. B) are found only in green, leafy vegetables. C) are essential as an energy source. D) are required for making nucleic acids. The enzymes of the citric […]

Most angiosperms are dicots, and most dicots are A) cycads. B) gymnosperms. C) eudicots. D) mosses. Which two groups of protists produce hard, mineralized skeletal structures or cell walls that contribute to marine sediments and form fossils? A) green algae […]

You are cleaning out an old lab freezer and find a tube that contains the ground-up remains of an unknown animal. Your research advisor suggests that you perform chemical assays to determine what molecules made up the animal. After analyzing […]

A vascular cambium cell divides to produce an inner and an outer daughter cell. Which of the following represents the probable fate of these cells? A) Both cells continue to divide to produce wood. B) The inner cell will differentiate […]

Which of the following is associated with obesity and occurs because cells of the body fail to respond adequately to insulin? A) type 1 diabetes B) type 2 diabetes C) hyperglycemia D) hypoglycemia Photophosphorylation during photosynthesis differs from oxidative phosphorylation […]

A peanut farmer decides that she can make more money growing cotton and so plants her fields with cotton. The terrific yield of her fields is so encouraging that she continues to plant cotton for several more years, but each […]

Which of the following is a member of the domain Archaea? A) gram-positive bacteria B) methanogens C) spirochetes D) chlamydias Transduction A) is the direct transfer of DNA from one bacterium to another. B) occurs when a bacterium acquires DNA […]

Which structure in this figure shows one complete nucleosome? A) structure A B) structure B C) structure C D) structure D Which of the following statements regarding behavior is true? A) Innate behaviors are performed the same way in all […]

Which of the following statements regarding fins on fishes is true? A) Fins evolved so that fish could swim better. B) Fins came about because animals couldn’t live in water without them. C) Fins are an adaptation that aid in […]

When taken by pregnant women, ________ decreases the chance of neural tube defects in infants. A) folic acid B) vitamin C C) vitamin K D) calcium A population of deer has a per capita rate of increase of 0.1 deer […]

The membranous compartmentalization of a cell A) divides the cell into two equal-sized halves. B) allows different chemical conditions to be maintained in different parts of the cell. C) requires the presence of a cell wall. D) is common to […]

A scientist suspects that the food in an ecosystem may have been contaminated with radioactive nitrogen over a period of months. Which of the following substances could be examined for radioactivity to test the hypothesis? A) the cell walls of […]

A plant cell in a hypotonic solution A) becomes turgid because of an inflow of water. B) bursts because of an inflow of water. C) shrivels because of an outflow of water. D) wilts because of an outflow of water. […]

Bone is composed of A) living cells that secrete a surrounding matrix. B) a hard composite of phosphate and sodium ions. C) channels containing lymphoid tissue. D) hardened cartilage. Which of the following occurs when RNA polymerase attaches to the […]

What name is given to the sheet of muscle that helps move air in and out of the lungs? A) trachea B) alveolus C) diaphragm D) bronchus Figure A. Changes in permeability of tubules in the kidney in response to […]

The last common ancestor shared by humans and chimpanzees lived about A) 6,000-8,000 years ago. B) 5-7 million years ago. C) 25-40 million years ago. D) 1.5-2.5 billion years ago. Most CO2 is transported to the lungs in which of […]

Anti-evolutionary thinkers sometimes argue that natural selection could not produce a complex structure like the vertebrate eye. They claim that all of the parts of the eye must have arisen at once, asking why natural selection would favor the development […]

Sustainable development A) will require making difficult decisions regarding travel to other planets. B) will require many people to contribute financially. C) will speed up evolution. D) will require global, multinational cooperation. You culture the dried soup from a 4,000-year-old […]

In the North Pacific Ocean, two groups of the same species of killer whales (Orcinus orca) appear to be forming two different species based on what they eat. One group eats fish and the other eats mammals such as seals. […]

A keystone species that is a predator will A) maintain the species diversity in a community. B) harvest prey species down to extinction. C) help many of its prey reproduce. D) reduce the diversity of the community. Which of the […]

Pronghorn antelopes are well adapted for dry conditions with extremes of temperature, especially cold. As global climate change causes the area where the pronghorn live to change, not only in temperature but also in what plants grow there and what […]

A woman struggling with a bacterial illness is prescribed a month’s supply of a potent antibiotic. She takes the antibiotic for about two weeks and feels much better. Should she save the remaining two-week supply, or should she continue taking […]

According to the sliding filament model of muscle contraction, a sarcomere contracts when its A) thick filaments slide across its Z lines. B) thin filaments slide across its Z lines. C) thin filaments slide toward each other across its thick […]

All the offspring of a cross between a red-flowered plant and a white-flowered plant have pink flowers. This means that the allele for red flowers is ________ to the allele for white flowers. A) dominant B) codominant C) incompletely dominant […]

Secretion is the movement of substances such as drugs or toxic molecules from the ________ into the ________. A) nephron tubule; glomerulus B) glomerulus; nephron tubule C) blood; filtrate D) urinary bladder; outside The function of coenzyme A in the […]

Justin has type A blood and his wife Brittany has type B blood. Justin’s parents both have type AB blood, and Brittany’s parents also both have type AB blood. What are the chances that Justin and Brittany’s son Theodore has […]

A single water molecule (HOH) is held together by A) a single covalent bond. B) a double covalent bond. C) two polar covalent bonds. D) hydrogen bonds. Which of the following hormones causes glucose release and, consequently, a rise in […]

Which of the following factors contributes to the flow of blood in veins? A) skeletal muscle contractions B) the number of red blood cells in venous blood C) the diameter of capillaries D) blood pressure generated by the heart Signal […]

A pathologist who wants to examine a patient’s liver cells to determine if the mitochondria have an internal structural defect will likely need to use a A) light microscope. B) transmission electron microscope. C) scanning electron microscope. D) chromatin stain. […]

Use the figure below to answer the questions that follow. Which part of the figure above shows an organ? A) part A B) part B C) part C D) part D Answer: C A mutant protist is found in which […]

Which of the following results from stimulation by the sympathetic nervous system? A) release of glucose from the liver B) decreased heart rate C) stimulation of the digestive organs D) constriction of the bronchi ________ makes it possible to trace […]

A common aspect of having a cold is nose congestion (‘stuffy nose”). Air is not able to flow past your olfactory receptors, so you cannot detect smells. When eating, it is olfactory receptors, and not taste receptors, that detect the […]

Textile mills often release dye color and toxic by-products into rivers and streams, which may then taint groundwater. Fungi associated with mangrove trees have been shown to reduce both colors and toxicity in tainted groundwater. Suppose that in 1990, fungal […]

In the figure, the shoot emerged through the soil toward the light rather than growing down in the direction of the roots due to A) thigmotropism. B) phototropism. C) gravitropism. D) circadian rhythm. Which of the following statements regarding diffusion […]

You enjoy learning about history by studying gravestones throughout North America. You notice that gravestones from 1900 and earlier usually host many types of lichens. But in one cemetery, lichens are entirely absent, even from old gravestones. Given what is […]

The dialyzing solution used during kidney dialysis functions much like a fluid associated with a nephron. What is the fluid? A) interstitial fluid B) the filtrate in the proximal tubule C) the filtrate in the loop of Henle D) the […]

Which figure depicts an animal cell placed in a solution hypotonic to the cell? A) cell A B) cell B C) cell C D) cell D A waste product of respiration is A) electrons. B) hydrogen peroxide. C) carbon dioxide. […]

A major type of lipid found in cell membranes is A) triglycerides. B) phospholipids. C) glycerol. D) waxes. Which part of this figure depicts the thoracic vertebrae? A) part A B) part B C) part C D) part D Answer: […]

Which of the following substances induces “bolting,” the rapid elongation of a plant stem? A) a gibberellin B) abscisic acid C) ethylene D) phytochrome When a T2 bacteriophage infects an Escherichia coli cell, which part of the phage enters the […]

The figure below depicts natural fluctuation of ozone levels in Switzerland between 1925 and 1976. Dobson units are a way to measure the total amount of atmospheric ozone above a point on the Earth’s surface. What can you conclude from […]

The electron transport chains of the light reactions A) are located in the stroma. B) shuttle electrons from photosystem II to photosystem I. C) provide energy for the citric acid cycle. D) are found on the plasma membrane of mesophyll […]

Photoautotrophs A) make sugar by using organic raw materials. B) produce organic molecules from inorganic molecules. C) eat other organisms that use light energy to make food molecules. D) include only the green plants. Which of the following serves as […]

In bowerbirds, the divergence illustrated in the figure is based on A) how often females visit the bower built by males. B) the color of the plumage of the females. C) the females’ preference for types of bower. D) the […]

After reading the paragraphs below, answer the questions that follow. Bipedalism is one of the most important characteristics of hominin evolution. The appearance of bipedalism led to anatomical changes that are considered to be distinguishing characteristics of hominin fossils. The […]

Dinoflagellates are important to coral and coral-dwelling animals because they A) produce energy that is used by coral animals through photosynthesis. B) provide shelter for the fast-growing seaweeds associated with coral. C) produce CO2 and nitrogen for coral. D) are […]

As a patch of scraped skin heals, the cells fill in the injured area but do not grow beyond that. This is an example of A) density-independent inhibition. B) density-dependent inhibition. C) anchorage independence. D) growth factor inhibition. The alleles […]

After reading the paragraph below, answer the questions that follow. All apples in the United States, regardless of variety or where they’re purchased, are produced by cloning. For more than 2,000 years, apple growers around the world have used a […]

Which of the following molecules are not required to express a gene in eukaryotic cells? A) RNA polymerase B) DNA-bending protein C) activator protein D) repressor protein Intestinal gas is evidence of active ________ in one’s digestive tract. A) thermophiles […]

Which of the following structures is the first to emerge from the germinating seed of a eudicot such as the garden bean? A) the embryonic shoot hook B) cotyledons C) the embryonic root D) the shoot sheath Which of the […]

Which of the following correctly lists the sequence of structures through which water passes into a root? A) guard cell, endodermis, cortex, xylem B) root hair, cortex, xylem, endodermis C) epidermis, cortex, endodermis, xylem D) root hair, xylem, endodermis, phloem […]

Human social behavior appears to be A) exclusively a product of our genes. B) determined by the environment. C) a product of our genes, external influences, and environment. D) unrelated to genetics. Guppies from Trinidad form two distinct populations that […]

In humans, which blood vessels have valves? A) arteries in the neck B) arterioles C) capillaries D) veins Epithelial tissues A) cause body movements. B) cover both external and internal body surfaces. C) sense stimuli. D) form a framework that […]

Menstruation A) is triggered by an LH surge. B) is triggered by HCG. C) is triggered by an increase in the levels of estrogen and progesterone. D) coincides with the beginning of the pre-ovulatory phase of the ovarian cycle. NADH […]

Which of the following genetically modified organisms has not been developed by genetic engineers (at least, not yet)? A) transgenic rice with genes for milk proteins B) transgenic salmon with a growth hormone gene that allows them to grow more […]

The stomach mixes food with secretions of the stomach wall to form A) gastric juice. B) a parietal bolus. C) gastrin. D) chyme. You arrive at your office and are startled by the sounds of building construction outside your window. […]

Which of the following diseases is associated with obesity? A) chicken pox B) multiple sclerosis C) cardiovascular disease D) rheumatoid arthritis After reading the paragraph below, answer the questions that follow. Ron and Tiffany are studying circulatory system function. They […]

Which of the following plant parts commonly contributes to asexual reproduction? A) seeds B) roots C) flowers D) fruits Which of the following is a function of the vertebrate liver? A) combining ammonia and carbon dioxide to form urea B) […]

The main function of muscle tissue is A) sensation. B) support. C) contraction. D) covering surfaces. Which of the following is widely regarded as a healthy approach to losing weight? A) gastric bypass surgery B) regularly engaging in exercise in […]

A plant’s first line of defense against infection is A) Avr genes. B) its epidermis. C) R genes. D) salicylic acid. Which of the following processes underlies the thigmotropic behavior of a green bean tendril? A) rotation of the tendril […]

Campbell Biology: Concepts and Connections, 8e (Reece et al.) Chapter 1 Biology: Exploring Life 1.1 Multiple-Choice Questions 1) Which of the following statements about the properties of life is false? A) Organisms have the ability to take in energy and […]

53) HIV does the greatest damage to A) the adrenal glands. B) pancreatic cells. C) nervous tissue. D) white blood cells. Answer: D Topic: 10.20 Skill: Knowledge/Comprehension Learning Outcome: 10.10 54) How do viroids harm the plants that are infected […]

Campbell Biology: Concepts and Connections, 8e (Reece et al.) Chapter 10 Molecular Biology of the Gene 10.1 Multiple-Choice Questions 1) Which of the following people conducted the experiments that demonstrated that DNA is the genetic material of bacteriophages? A) Watson […]

Campbell Biology: Concepts and Connections, 8e (Reece et al.) Chapter 11 How Genes Are Controlled 11.1 Multiple-Choice Questions 1) The term “gene expression” refers to the A) fact that each individual of a species has a unique set of genes. […]

52) Which of the following statements regarding cancer risk factors is false? A) Factors that alter DNA and make cells cancerous are called carcinogens. B) Mutagens are usually not carcinogens. C) X-rays and ultraviolet radiation are two of the most […]

Campbell Biology: Concepts and Connections, 8e (Reece et al.) Chapter 12 DNA Technology and Genomics 12.1 Multiple-Choice Questions 1) Biotechnology A) is a modern scientific discipline that has existed for only a few decades. B) is strictly concerned with the […]

55) Which of the following is an example of a genetically modified organism but not a transgenic organism? A) Flavr Savr peaches (peaches that express larger quantities of a peach stability enzyme) B) Golden Rice (rice that expresses daffodil and […]

Campbell Biology: Concepts and Connections, 8e (Reece et al.) Chapter 13 How Populations Evolve 13.1 Multiple-Choice Questions 1) Blue-footed boobies have webbed feet and are comically clumsy when they walk on land. Evolutionary scientists view these feet as A) an […]

39) A rabbit population consists of animals that are either very dark on top or very light on top. The color pattern is not related to sex. No rabbit shows intermediate coloration (medium darkness). This pattern might result from A) […]

Campbell Biology: Concepts and Connections, 8e (Reece et al.) Chapter 14 The Origin of Species 14.1 Multiple-Choice Questions 1) Speciation, or the formation of new species, is A) a form of microevolution. B) responsible for the diversity of life. C) […]

40) Which of the following descriptions best represents the gradual model of speciation? A) Speciation occurs regularly as a result of the accumulation of many small changes. B) An isolated population differentiates quickly from its parent stock as it adapts […]

Campbell Biology: Concepts and Connections, 8e (Reece et al.) Chapter 15 Tracing Evolutionary History 15.1 Multiple-Choice Questions 1) The “big bang” that produced the universe is thought to have occurred A) 40 to 50 billion years ago. B) 12 to […]

A) genus, family, class, order, phylum B) genus, family, order, class, phylum C) family, genus, order, phylum, class D) family, genus, class, order, phylum Answer: B Topic: 15.15 Skill: Knowledge/Comprehension Learning Outcome: 15.10 52) ________ and ________ mean the same […]

49) Multicellular organisms evolved from three different ancestral lineages: alveolates, unikonts, and archaeplastids. Of these, fungi and animals evolved from two different lineages of ________, and land plants are ________. A) alveolates; unikonts B) alveolates; archaeplastids C) unikonts; archaeplastids D) […]

Campbell Biology: Concepts and Connections, 8e (Reece et al.) Chapter 16 Microbial Life: Prokaryotes and Protists 16.1 Multiple-Choice Questions 1) Individual prokaryote cells are about ________ eukaryote cells; collectively, all prokaryote cells on Earth ________. A) the same size as; […]

47) A mushroom A) is composed of many threadlike filaments called mycorrhizae. B) is specialized to obtain most of the nutrients for the fungal mycelium. C) is an independent stage in the alternation of generations of the fungal life cycle. […]

1 Campbell Biology: Concepts and Connections, 8e (Reece et al.) Chapter 17 The Evolution of Plant and Fungal Diversity 17.1 Multiple-Choice Questions 1) The ancestors of land plants were probably ________ that lived in ________. A) green algae similar to […]

1 Campbell Biology: Concepts and Connections, 8e (Reece et al.) Chapter 18 The Evolution of Invertebrate Diversity 18.1 Multiple-Choice Questions 1) All animals A) are prokaryotic. B) are heterotrophic. C) have cell walls made of chitin. D) obtain food by […]

46) Which of the following phyla is most closely related to echinoderms? A) Annelida B) Mollusca C) Arthropoda D) Chordata Answer: D Topic: 18.14 Skill: Knowledge/Comprehension Learning Outcome: 18.5 47) The flexible, longitudinal rod that is located between the digestive […]

48) All humans alive today have inherited their mitochondrial DNA from some individual female common ancestor. Studies indicate this woman probably lived about ________ years ago, when fossil evidence indicates that Homo sapiens was restricted to ________. A) 20,000; Africa […]

Campbell Biology: Concepts and Connections, 8e (Reece et al.) Chapter 19 The Evolution of Vertebrate Diversity 19.1 Multiple-Choice Questions 1) The duck-billed platypus and other monotremes differ from other mammals in that they A) are aquatic. B) lay eggs. C) […]

44) Clots in our blood can lead to a heart attack or stroke by blocking blood flow. If a clot were made up of a mass of proteins, what changed in the proteins to cause them to form the clot? […]

Campbell Biology: Concepts and Connections, 8e (Reece et al.) Chapter 2 The Chemical Basis of Life 2.1 Multiple-Choice Questions 1) The four most common elements in living organisms are A) C, H, O, Fe. B) C, H, O, Na. C) […]

Campbell Biology: Concepts and Connections, 8e (Reece et al.) Chapter 20 Unifying Concepts of Animal Structure and Function 20.1 Multiple-Choice Questions 1) The laryngeal nerve is 15 feet long in giraffes because A) the giraffe’s throat is located far away […]

16 61) When taken by pregnant women, ________ decreases the chance of neural tube defects in infants. A) folic acid B) vitamin C C) vitamin K D) calcium 62) Xerostomia is the scientific name for “dry mouth.” Dry mouth can […]

Campbell Biology: Concepts and Connections, 8e (Reece et al.) Chapter 21 Nutrition and Digestion 21.1 Multiple-Choice Questions 1) Which of the following statements regarding animals is false? A) Animals that eat plants are called herbivores. B) Animals that eat meat […]

45) When bar-headed geese fly at very high altitudes (possibly over Mount Everest!), they breathe very thin air where the partial pressure of oxygen is very low compared to that at sea level. Which of the following adaptions would help […]

Campbell Biology: Concepts and Connections, 8e (Reece et al.) Chapter 22 Gas Exchange 22.1 Multiple-Choice Questions 1) Which of the following animals would be most likely to be able to effectively exchange gases when placed in a dry desert environment? […]

Campbell Biology: Concepts and Connections, 8e (Reece et al.) Chapter 23 Circulation 23.1 Multiple-Choice Questions 1) Which of the following statements regarding circulatory systems is true? A) The smallest blood vessels in the body are veins. B) A circulatory system […]

53) During exercise, your heart rate can increase dramatically in order to meet the metabolic demands of your tissues. If your heart rate increased to 144 beats per minute, approximately how long would diastole last? A) 0.2 second B) 0.6 […]

49) What type of immune response is always disadvantageous to a person? A) inflammatory B) humoral C) autoimmune D) complement-mediated Answer: C Topic: 24.17 Skill: Knowledge/Comprehension Learning Outcome: 24.7 50) Which of the following compounds is produced and secreted by […]

1 Campbell Biology: Concepts and Connections, 8e (Reece et al.) Chapter 24 The Immune System 24.1 Multiple-Choice Questions 1) The body’s innate defenses against infection include A) several specific antibodies. B) barriers such as dead skin cells and mucus. C) […]

Campbell Biology: Concepts and Connections, 8e (Reece et al.) Chapter 25 Control of Body Temperature and Water Balance 25.1 Multiple-Choice Questions 1) Thermoregulation, an important part of homeostasis, is defined as A) a mechanism for utilizing body fat for energy. […]

Campbell Biology: Concepts and Connections, 8e (Reece et al.) Chapter 26 Hormones and the Endocrine System 26.1 Multiple-Choice Questions 1) Hormones are chemicals produced by the endocrine system that A) control the formation of urine. B) regulate a variety of […]

Campbell Biology: Concepts and Connections, 8e (Reece et al.) Chapter 27 Reproduction and Embryonic Development 27.1 Multiple-Choice Questions 1) Coral reefs are made up of genetically identical coral polyps. New polyps develop as offshoots from the parental polyp. What type […]

55) Your friend tells you that as long as you can track the exact day that a woman ovulates, and as long as a woman does not have sexual intercourse on this day, then she will not get pregnant even […]

Campbell Biology: Concepts and Connections, 8e (Reece et al.) Chapter 28 Nervous Systems 28.1 Multiple-Choice Questions 1) The central communication conduit between the brain and the rest of the body is the A) brainstem. B) nerve bundle. C) spinal cord. […]

45) The human cerebral cortex accounts for what percentage of the total mass of the brain? A) 20% B) 40% C) 60% D) 80% Answer: D Topic: 28.16 Skill: Knowledge/Comprehension Learning Outcome: 28.8 46) Which of the following statements regarding […]

Campbell Biology: Concepts and Connections, 8e (Reece et al.) Chapter 29 The Senses 29.1 Multiple-Choice Questions 1) You arrive at your office and are startled by the sounds of building construction outside your window. As you settle in to your […]

53) Which of the following is an example of secondary structure in a protein? A) a particular amino acid sequence B) an alpha helix C) a globular shape D) the joining of two polypeptide chains Answer: B Topic: 3.14 Skill: […]

Campbell Biology: Concepts and Connections, 8e (Reece et al.) Chapter 3 The Molecules of Cells 3.1 Multiple-Choice Questions 1) Lactose intolerance is the inability to A) produce milk proteins. B) produce lactose. C) digest cellulose. D) digest lactose. Answer: D […]

48) Which of the following statements regarding exercise is true? A) The main source of energy during aerobic exercise is ATP from aerobic respiration. B) For an activity such as jogging or long-distance running, the primary source of energy is […]

Campbell Biology: Concepts and Connections, 8e (Reece et al.) Chapter 30 How Animals Move 30.1 Multiple-Choice Questions 1) Suppose that the circular muscles in an earthworm have become selectively paralyzed such that they are not able to contract. How will […]

53) The genetically identical organisms that result from asexual reproduction are called A) clones. B) seeds. C) seedlings. D) rootlets. Answer: A Topic: 31.14 Skill: Knowledge/Comprehension Learning Outcome: 31.6 54) Which of the following is an advantage of cloning horticultural […]

Campbell Biology: Concepts and Connections, 8e (Reece et al.) Chapter 31 Plant Structure, Growth, and Reproduction 31.1 Multiple-Choice Questions 1) The tallest plant on Earth is A) a 500-foot kelp living off the coast of California. B) a 379-foot redwood […]

Campbell Biology: Concepts and Connections, 8e (Reece et al.) Chapter 32 Plant Nutrition and Transport 32.1 Multiple-Choice Questions 1) In an attempt to determine the source of a growing plant’s mass, van Helmont planted a willow seedling in a pot […]

Campbell Biology: Concepts and Connections, 8e (Reece et al.) Chapter 33 Control Systems in Plants 33.1 Multiple-Choice Questions 1) Which of the following is an example of an evolutionary adaptation that decreases herbivory? A) Plants of the milkweed family produce […]

Campbell Biology: Concepts and Connections, 8e (Reece et al.) Chapter 34 The Biosphere: An Introduction to Earth’s Diverse Environments 34.1 Multiple-Choice Questions 1) The primary source of energy for hydrothermal vent communities is A) the heat of the water emerging […]

1 Campbell Biology: Concepts and Connections, 8e (Reece et al.) Chapter 35 Behavioral Adaptations to the Environment 35.1 Multiple-Choice Questions 1) Answers to questions about the immediate mechanisms for a behavior are called A) conclusions. B) proximate causes. C) habituation. […]

Campbell Biology: Concepts and Connections, 8e (Reece et al.) Chapter 36 Population Ecology 36.1 Multiple-Choice Questions 1) A group of individuals of a single species that occupy the same general area defines a A) population. B) community. C) subspecies. D) […]

Campbell Biology: Concepts and Connections, 8e (Reece et al.) Chapter 37 Communities and Ecosystems 37.1 Multiple-Choice Questions 1) A community is composed of A) potentially interacting populations of different kinds of organisms. B) one species of organism living in a […]

Campbell Biology: Concepts and Connections, 8e (Reece et al.) Chapter 38 Conservation Biology 38.1 Multiple-Choice Questions 1) The primary goal of conservation biology is to A) estimate the total number of species that exist. B) maximize the land set aside […]

56) The stroma is the A) thick fluid enclosed by the inner chloroplast membrane. B) watery fluid enclosed by the inner membrane of a mitochondrion. C) space between the inner and outer membranes of a chloroplast. D) space between the […]

Campbell Biology: Concepts and Connections, 8e (Reece et al.) Chapter 4 A Tour of the Cell 4.1 Multiple-Choice Questions 1) Which of the following statements about cells is true? A) All cells have cell walls. B) All cells have internal […]

Campbell Biology: Concepts and Connections, 8e (Reece et al.) Chapter 5 The Working Cell 5.1 Multiple-Choice Questions 1) Many physiological conditions are related to particular proteins in cell membranes. The number of insulin receptors in membranes is related to the […]

51) Which of the following processes is classified as a metabolic pathway? A) protein synthesis B) osmosis C) cell lysis D) passive diffusion Answer: A Topic: 5.11 Skill: Application/Analysis Learning Outcome: 5.6 Global LO: 2 52) When a cell uses […]

49) In fermentation, ________ is ________. A) NADH; reduced B) NAD+; oxidized C) NADH; oxidized D) ethanol; oxidized Answer: C Topic: 6.13 Skill: Knowledge/Comprehension Learning Outcome: 6.3 50) When an organism such as a yeast lives by fermentation, it converts […]

Campbell Biology: Concepts and Connections, 8e (Reece et al.) Chapter 6 How Cells Harvest Chemical Energy 6.1 Multiple-Choice Questions 1) Which of the following statements regarding photosynthesis and cellular respiration is true? A) Photosynthesis occurs in chloroplasts, and cellular respiration […]

49) Photosynthetic organisms derive their carbon from A) carbon monoxide. B) carbon dioxide. C) hydrocarbons. D) methane. Answer: B Topic: 7.1, 7.10 Skill: Knowledge/Comprehension Learning Outcome: 7.1 50) ATP and NADPH A) power sugar synthesis during the Calvin cycle. B) […]

Campbell Biology: Concepts and Connections, 8e (Reece et al.) Chapter 7 Photosynthesis: Using Light to Make Food 7.1 Multiple-Choice Questions 1) What is the name given to organisms that can make their own food and thus sustain themselves without consuming […]

49) Which of the following statements regarding Down syndrome is false? A) Trisomy 21 is the cause of Down syndrome. B) Down syndrome is the most common serious birth defect in the United States. C) People with Down syndrome usually […]

1 Campbell Biology: Concepts and Connections, 8e (Reece et al.) Chapter 8 The Cellular Basis of Reproduction and Inheritance 8.1 Multiple-Choice Questions 1) The creation of genetically identical offspring by a single parent, without the participation of sperm and egg, […]

51) Any gene located on a sex chromosome A) is called a recessive gene. B) is called a sex-linked gene. C) will exhibit pleiotropy. D) will exhibit codominance. Answer: B Topic: 9.21 Skill: Knowledge/Comprehension Learning Outcome: 9.11 52) Recessive X-linked […]

Campbell Biology: Concepts and Connections, 8e (Reece et al.) Chapter 9 Patterns of Inheritance 9.1 Multiple-Choice Questions 1) Which of the following statements best represents the theory of pangenesis developed by Hippocrates? A) Pregnancy is a spontaneous event, and the […]