Archives: Quiz

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. […]

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 […]

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 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 […]

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 […]

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 […]

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 […]

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 […]

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 […]

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 […]

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 […]

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 […]

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 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 […]

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 […]

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 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 […]

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 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 […]

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 […]

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 […]

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 […]

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) […]

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 […]

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 […]

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 […]

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 […]

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 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. […]

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 […]

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 […]

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 […]

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 […]

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 […]

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 […]

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: […]

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 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 […]

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 […]

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 […]

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 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 […]

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 […]

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 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 […]

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 […]

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, […]

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 […]

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 […]

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 […]