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1) both the neural and endocrine systems play a role in coordinating body activities. 2) most chromalveolateshave the alternation of generations life cycle, but some species of fungus have a diplontic life cycle. Answer: true 3) chemiosmotic atp synthesis occurs […]

1) all hominoids walk upright. 2) communication is an action by a sender that may influence the behavior of a receiver. Answer: true 3) chloroplast are capable of running photosynthesis which is the most abundant form of anabolic metabolism in […]

1) the liver functions in digestion by a. converting hemoglobin to bilirubin and biliverdin. b. destroying old red blood cells. c. producing blood proteins. d. producing urea. e. producing bile. 2) lungless salamanders lack lungs and breathe through their skins […]

1) extinction can occur if a species is unable to adapt to a changing environment. 2) gene therapy is being used in cancer patients to make healthy cells more tolerant of chemotherapy and to make tumors more vulnerable to chemotherapy. […]

1) an abandoned indiana coal mine spoil bank contains chunks of pyrite minerals. under constant erosion and weathering, the pyrites leech large amounts of sulfuric acid (h2so4). the spoil banks are also mixed with large quantities of basic limestone and […]

1) which term refers to the attraction to water molecules? a. hydrophilic b. hydrophobic c. hydrolysis d. photolysis e. nitrophylic 2) darwin’s opinion that living forms must be descended from extinct forms was based on ________ evidence. a. anatomical b. […]

1) all cells have a cell wall that regulates the passage of molecules into and out of the cell. 2) dr. james isolated staphylococcus aureus, a type of bacteria, from the leg wound of a ten year old boy. he […]

1) when bone marrow stem cells are removed from the patient, infected with a virus that carries a normal gene, and returned to the patient, this is an example of a. pcr. b. chemotherapy. c. viral disinfection. d. in vivo […]

1) among the many functions of wetlands is (are) a. providing food and habitats for fish, waterfowl, and wildlife. b. purifying water by filtering it and breaking down toxic wastes and nutrients. c. absorbing storm and overflow waters. d. all […]

1) approximately what percentage of the energy in one trophic level is incorporated into the next trophic level? a. 1% b. 10% c. 30% d. 60% e. 100% 2) a typical leaf is composed of multiple layers of specialized cells. […]

1) when a round fruit plant is crossed with a long fruit plant their offspring are oval. what is the best explanation for this scenario? a. pleiotropic inheritance b. polygenic inheritance c. incomplete dominance d. x-linked inheritance 2) tropical rainforests […]

1) which of the following endocrine glands does not produce its own hormones, but stores hormones produced by the hypothalamus? a. thyroid b. adrenal cortex c. adrenal medulla d. posterior pituitary e. anterior pituitary 2) what type of fiber accounts […]

1) an elementary student decides to conduct an experiment comparing the effectiveness of two commercial soaps as cleaning agents, using each in paired tests of different types of stains and colors of cloth, where the only variable was the soap […]

1) which line of defense would be the most severely impacted if a person was to suffer 3rd degree burns across the majority of their lower body? a. innate immunity b. adaptive immunity c. production of t & b cells […]

1) if the hypothesis that protocells were based on an “rna world” is correct, what would be necessary to shift to a “dna world”? a. an enzyme or reaction capable of removing one oxygen from ribose in nucleotides b. enzymes […]

1) the temperature is nearly uniform throughout a lake a. during winter when the ice forms an insulating cover. b. during summer when the sunlight warms the surface and the wind mixes the layers. c. by the end of the […]

1) which characteristic of pea plants were important in their selection as mendel’s research organism? a. peas are easy to cultivate. b. pea plants have a short generation time. c. pea plants are self-pollinating but can be cross-fertilized easily. d. […]

1) which type of soil is best able to retain calcium and potassium, preventing them from being leached away by runoff? a. clay b. humus c. sand d. all soils are equal in preventing leaching of minerals. e. none of […]

1) the structures in the outermost ring of floral structures that cover and protect the bud are a. carpels. b. sepals. c. receptacles. d. petals. e. stamens. 2) which of the following is not one of the stages of hiv […]

1) a 10% glucose solution is placed in the thistle tube. the thistle tube is placed in a beaker that contains a 5% glucose solution. where is the highest concentration of water found? a. in the 10% solution b. in […]

1) you need to identify a plant, but it is winter and the leaves have fallen to the ground and mixed with leaves from other plants. the parts of flowers, fruits, and seed leaves of germinating seeds are not available […]

1) single celled eukaryotic cells belong to which of the following domains? a. eukarya b. fungi c. animalia d. plantae 2) in the pine life cycle, a. fertilization occurs shortly after pollination to produce the zygote. b. the gametophyte generation […]

1) transgenic plant products include all of the following except a. soybeans that are resistant to a common herbicide. b. an antibody produced by soybeans to treat genital herpes. c. suicide genes that cause the plants to self destruct after […]

1) all food chains begin with a photosynthetic producer. 2) in order for a community to reach the status of climax community, succession must always begin with pioneer species. Answer: false 3) the human embryo becomes a fetus at the […]

1) the first eukaryotic cells probably arose about _____ billion years ago. a. 2.2 b. 2.5 c. 3.5 d. 4.5 2) if you are trying to alter the defensive mechanisms of a plant, which component of the signal transduction pathway […]

1) study the figure at right. what does the letter a depict? a. energy of the reactant b. energy of the products c. energy of activation d. substrate concentration 2) substrates that reoccur in several metabolic pathways form the metabolic […]

1) flukes are divided into monogenea and digenea. monogenea have a posterior holdfast with hooks, clamps, and suckers; digenea have suckers but never hooks and clamps. monogenea have only one host in the life cycle, and usually live on gills […]

1) in spite of hundreds of millions of dollars spent on insecticides targeted at pest control for agricultural and medical purposes, man has been unable to drive any to extinction. on the other hand, the extinction of many species of […]

1) simple goiter can be prevented by a. surgery to remove the thyroid gland. b. removal of the pituitary. c. administration of acth. d. administration of insulin. e. increasing intake of iodine in the diet. 2) after eating eggs for […]

1) the cylinders in this experiment represent a 24-hour period. the light area represents light periods during a 24-hr. period and the dark area represents dark periods during a 24-hr. period. the critical length of dark vs. light periods for […]

1) snakes, frogs, squirrels and humans are all classified as being homeothermic. 2) diagnostic traits can be used to distinguish between species of living organisms only. Answer: false 3) the first species to begin secondary succession are called pioneer species, […]

1) which hormone from the adrenal cortex of the kidneys will cause the distal convoluted tubules to reabsorb more sodium ions? a. renin b. angiotensinogen c. angiotensin ii d. adh e. aldosterone 2) immediate allergic responses are caused by ______ […]

1) which biome is characterized by rainfall under 25 cm/year, hot days, cold nights, and quickly blooming plants? a. grasslands b. temperate deciduous forest c. temperate deserts d. taiga e. tundra 2) what type of selection is occurring in a […]

1) which of the following statements concerning the indirect values of biodiversity is not correct? a. trees take up carbon dioxide and release oxygen when they photosynthesize. b. forests act as a sponge to soak up water and release it […]

1) the four defining characteristics of chordates are a. segmentation, a dorsal hollow nerve cord, pharyngeal pouches, and an amniotic egg. b. a dorsal hollow nerve cord, a notochord, bilateral symmetry, and mammary glands. c. bilateral symmetry, segmentation, a well-developed […]

1) the differences between organic and inorganic molecules do not follow simple absolute rules. however, most organic molecules are associated with living organisms. which of the following statements does not correspond to the general distinctions between these types of molecules? […]

1) an adolescent female who is hyperactive, nervous, irritable and has eyes that are protruding from their sockets is most likely suffering from ________ which is caused by ___________. a. grave’s disease, oversecretion of t3 or t4 due to antibodies […]

1) if macroevolution was goal oriented then organisms would be perfect in form and not have any flaws. 2) only lycophytes have true roots, stems, and leaves. Answer: false 3) lenticels are small openings on the underside of eudicot leaves […]

1) which aquatic zone will provide habitat for invertebrates and many small fish? a. littoral zone b. profundal zone c. epipelagic zone d. limnetic zone 2) which of the following tissues forms the outer protective covering of the plant? a. […]

1) conservation biology is a field that relies on multiple other disciplines to support it. 2) gene cloning can be accomplished by recombinant dna technology and polymerase chain reactions. Answer: true 3) the hardy-weinberg equilibrium is usually met in populations […]

1) identify the feature found in cooksonia that qualify it as a vascular plant. a. presence of roots b. contained leaves c. had branches that ended in sporangia d. produced windblown spores 2) which association of structure and function is […]

1) an organism does not necessarily have to ensure that its own genes are passed to the next generation. the adaptation to the environment due to the reproductive success of an organism’s relatives is a. altruism. b. kin selection. c. […]

1) all of the biochemical pathways in a cell constitute a. coupling reactions. b. free energy. c. endergonic reactions only. d. exergonic reactions only. e. metabolism. 2) the epidermis consists of a. stratified squamous epithelial cells. b. collagen fibers. c. […]

1) what is the major reason why xenotransplantation is not being widely used in medicine today? a. the human patient will often reject the animal organ. b. there are not enough animal organs available for transplant. c. people are not […]

1) the early explorers used sailing ships, which were blown by the major winds; therefore, columbus and other sailors generally traveled from europe to north america by the mid-latitude westerlies, and returned to europe by the southern easterlies near the […]

1) which of the following groups ofplants contain microphylls? a. lycophytes b. pteridophytes c. bryophytes d. gymnosperms e. angiosperms 2) which of the following organisms is not ultimately dependent on the sun as a source of energy? a. a night-blooming […]

1) which piece of evidence supports the hypothesis of continental drift? a. alfred wegener believed that the continents formed a supercontinent called pangea. b. charles darwin believed that the continents formed a supercontinent called pangea. c. charles lyell believed that […]

1) marine annelids (polychaetes) are different than earthworms in that polychaetes a. lack the setae that earthworms have. b. have paddle-like parapodia that earthworms do not have. c. have segments, whereas marine annelids do not. d. lack a larval form, […]

1) if an individual was interested in eating a healthy breakfast that would provide them with energy for the entire day the breakfast should include which of the following foods? a. whole grain cereal with 4 ounces of milk. b. […]

1) a change in the chromosome number resulting from nondisjunction is called euploidy. 2) some memories are emotionally charged because the amygdala triggers associations between fear and sensory information. Answer: true 3) the iron in a hemoglobin molecule is actually […]

1) the northern copperhead is agkistrodon contortrix contortrix, the southern copperhead is agkistrodon contortrix mokasen, and the cottonmouth is agkistrodon piscivorous. therefore, a. all are subspecies of agkistrodon. b. they are three distinct species. c. the copperheads are subspecies and […]

1) which statement is not true about water uptake in a plant root? a. water enters the root from the soil by osmosis. b. water enters the cytoplasm of the root hairs by active transport. c. water travels by diffusion […]

1) which of the following pathogens would our innate immunity help protect us against? a. viruses b. bacteria c. fungi d. innate immunity would defend us against all of these pathogens. 2) which of the following is not a function […]

1) what is the molecular formula for 5 glucose molecules? a. c30h50o25 b. c30h60o30 c. c30h52o26 d. c6h24o12 2) ______ were the first vertebrates to live on land and they evolved from _____. a. amphibians; fish b. reptiles; amphibians c. […]

1) which of the following statements about dna replication is not correct? a. unwinding of the dna molecule occurs as hydrogen bonds break. b. replication occurs as each base is paired with another exactly like it. c. the process is […]

1) which of the following features is unique to bacterial cells? a. nucleoid region b. nucleus c. cell membrane d. cell wall e. ribosome 2) which feature is found in the bony fish but not in the cartilaginous fish? a. […]

1) as lymph passes through the sinuses of lymph nodes, it is filtered by ______ that engulf debris and pathogens. a. t cells b. b cells c. neutrophils d. macrophages 2) homologous structures such as the bones in wings, flippers, […]

1) mammals are different from birds in all these characteristics except a. hair. b. mammary glands. c. constant body temperature. d. young born alive. 2) which muscle list of structures is correctly organized from large to small? a. muscle, muscle […]

1) which statement is not true about natural selection? a. directional selection occurs when one extreme phenotype is favored over another different extreme phenotype. b. stabilizing selection favors an intermediate phenotype over either of the extreme phenotypes. c. disruptive selection […]

1) where on this phylogenetic tree of primate evolution do you find evolution of the hominines? a. no. 1 b. no. 2 c. no. 3 d. no. 4 e. no. 5 Answer: b 2) which carbohydrate is used in the […]

1) which of the following is not associated with animal cells? a. an extracellular matrix b. plasmodesmata c. gap junctions d. adhesion junctions (desmosomes) e. tight junctions incorrect 2) which statement is not correct about the trp operon? a. the […]

1) it is estimated that humans have approximately ______ base pairs in our genome. a. 3 billion b. 2.5 million c. 180 million d. 12 trillion 2) which of the following substances have not been identified as a pamp? a. […]

1) based on this tree, mammals are as closely related to birds as they are to snakes. 2) transgenic plants must be approved by the food and drug administration before they are considered safe for human consumption. Answer: true 3) […]

1) choose the correct order of classification from most inclusive to exclusive. a. domain-kingdom-phylum-class-order-family-genus-species b. kingdom-domain-class-phylum-order-family-genus-species c. kingdom-domain-class-phylum-order-genus-species-family d. kingdom-class-phylum-domain-genus-order-family-species 2) which of the following definitions best describes the role of pathogen-associated molecular patterns (pamp’s)? a. pamp’s are molecules on […]

1) once exposed to an antibiotic drug, bacteria will develop a resistance in order to survive and then pass the resistance onto subsequent generations. this is an example of lamark’s idea of the inheritance of acquired characteristics. 2) the deceleration […]

1) the waggle dance of a bee indicates to other bees in the hive the direction of food. 2) the process by which a white blood cell or an amoeba engulfs bacteria is called phagocytosis. Answer: true 3) are only […]

1) a flagellated protist that is sexually transmitted is a. plasmodium. b. giardia. c. entamoeba. d. trichomonas. e. paramecium. 2) which factor led to mendel’s success as a scientist? a. applied mathematics to the field of science b. followed the […]

1) the term “protists” is used to refer to eukaryotes that are not plants, animals or fungi. 2) rejection of transplanted tissue is treated with immunosuppressive drugs that prevent the activity of b cells. Answer: false 3) the distribution of […]

1) a functional advantage of having human testes in the scrotum rather than in the abdomen is a. lack of room in the abdomen. b. a shorter sperm duct. c. more direct blood supply. d. lower temperature. e. greater protection […]

1) identify what happens when the doctor hits your knee cap with the rubber hammer during your annual physical. a. the stimulus travels down the axon of your sensory neuron, through the dorsal root ganglion, is transmitted through the dendrites […]

1) which of these plant tissue types is composed of sieve-tube elements and companion cells, and transports organic nutrients made in the leaves? a. xylem b. phloem c. collenchyma d. sclerenchyma e. parenchyma 2) which of the following processes does […]

1) what would you find in the heart of an amphibian? a. one atrium and one ventricle b. two atria and one ventricle c. one atrium and two ventricles d. two atria and two ventricles e. two atria and a […]

1) match the terms in the word bank with the labeled structures on the diagram. briefly define the function of each structure: axon, nucleus, cell body, dendrite, myelin sheath. 1> b – cell body a. the part of a neuron […]

1) the most successful mammals belong to the marsupials group. 2) a community that contains a low species diversity will often have a high species richness. Answer: false 3) the gymnosperms produce seeds that are enclosed within a fruit. Answer: […]

1) which of the following features would have helped early plant ancestors evolve to a terrestrial existence? a. cellulose in the cell walls b. apical cells c. plasmodesmata d. placenta e. all of these features would have helped 2) what […]

1) which description best describes the cell wall of a gram-positive bacteria? a. it is composed of a single plasma membrane and a thin outer layer of peptidoglycan. b. it is composed of a double layer in the plasma membrane […]

1) both t3 and t4 are produced in the thyroid and are responsible for increasing the metabolic rate of specific organs in the body. 2) it is estimated that an average of two or three cross-overs occur per human chromosome. […]

1) all chordates are also vertebrates. 2) vascular tissue extends through the roots, stems, and leaves of the entire plant. Answer: true 3) both living and nonliving entities adapt to the environment Answer: false 4) altruism is very rare in […]

1) with negative pressure breathing, the muscles that move the ribs and diaphragm are distant from the absorptive alveolar surfaces. what difficulty(ies) could occur if the muscles were around each alveolus and had to expand each alveolus to suck in […]

1) the concentration of protein in the blood is higher in post-glomerular blood as compared with that in arterial blood because a. protein is digested and then concentrated in glomerular (bowman’s) capsule. b. the kidney manufactures and then stores protein […]

1) the structure that absorbs nutrients from the small intestines and delivers the nutrients in the blood to the liver is the a. hepatic portal artery. b. hepatic portal vein. c. renal vein. d. none of the choices are correct. […]

1) which of the following crosses would always result in offspring that only display the dominant phenotype? a. tt x tt b. tt x tt c. tt x tt d. tt x tt e. two of the crosses will always […]

1) ecologist robert macarthur observed that five species of similar warblers coexisted on spruce trees because they a. ate different kinds of insects. b. cooperated in their foraging habits. c. foraged in different places of the tree canopy. d. were […]

1) which component of the flowering plant is considered the female portion of the plant? a. carpel b. stamen c. style d. corolla 2) which of the following features were present in the transitional species between amphibian tetrapods and the […]

1) food is prevented from entering the trachea by the a. pharynx. b. larynx. c. epiglottis. d. glottis. e. sphincter muscle. incorrect 2) major cardiovascular disorders include all of the following except a. atherosclerosis. b. stroke. c. hypertension. d. diabetes. […]

1) generally the respiratory system in birds a. is identical to the human breathing system. b. is merely accelerated by the flight muscles. c. resembles the positive pressure system of a frog. d. is a one-way circulation of air so […]

1) if the probability of event a is 3/4 and the probability of event b is 1/4, then the probability of both a and b occurring at the same time is a. 3/4. b. 1/4. c. 1 or absolute certainty. […]

1) which is not true about the electrical charges in chemistry? a. protons carry a positive charge. b. in an atom, the number of protons and neutrons must be equal. c. an atom is neutral when the positive and negative […]

1) cnidaria and flatworms exchange gases and remove wastes by way of their a. open circulatory systems. b. closed circulatory systems. c. gastrovascular cavities. d. moist skin surfaces. e. respiratory and excretory systems. 2) which of the following organisms will […]

1) a population of organisms that reproduce asexually without gametes from other individuals will display more variation than a population that reproduces sexually. 2) analogous structures serve the same function, are similarly constructed and are inherited from a common ancestor. […]

1) in order for signal transduction to work properly in plants the ______________________. a. correct hormone needs to bind to the appropriate receptor in order to enter the cell b. relay proteins need to amplify the signal and convert it […]

1) the particular place where an organism lives is its a. life zone. b. niche. c. ecosystem. d. community. e. habitat. 2) the part of the brain that controls the anterior pituitary gland secretions is the a. medulla. b. thalamus. […]

1) the correct order in which a light ray reaches the retina is: a. cornea-vitreous humor-pupil-lens-aqueous humor-retina. b. lens-vitreous humor-cornea-aqueous humor-retina. c. lens-cornea-aqueous humor-vitreous humor-retina. d. cornea-aqueous humor-pupil-lens-vitreous humor-retina. e. lens-aqueous humor-cornea-vitreous humor-retina. 2) why do polar bodies form? a. […]

1) which of the following statements about the process of hearing is true? a. hearing is not dependent on the inner ear. b. all parts of the organ of corti hear all ranges of sound. c. loud music cannot damage […]

1) what is the main reason for the changes that are occurring in the earth’s climate? a. large scale deforestation b. disruption of the waste recycling by decomposers c. over harvesting of wild species for consumptive value d. drainage of […]

1) growth at two replication forks arising from a single origin of replication produce a “bubble” as daughter dna molecules form. 2) metamorphosis is a change in form and physiology that occurs during the development of an insect. Answer: true […]

1) all of the following structures are part of the male reproductive system except a. testes. b. epididymis. c. penis. d. fimbriae. e. prostate. 2) imagine a person has a genetic disorder that prevents them from producing the protein collagen, […]

1) which of the following structures is a stem adaptation instead of a root adaptation? a. stolons b. rhizomes c. tubers d. corms e. all are stem adaptations 2) a person working in a rice paddy in asia becomes infected […]

1) the use of a molecular clock may be used to indicate relatedness and evolutionary time a. if nucleic acid changes are neutral and not tied to adaptation. b. if nucleic acid changes occur at a fairly constant rate. c. […]

1) what is the scalanaturae? a. a species of horse b. the first theory of evolution c. a sequential ladder of life, with humans at the top d. another name for the theory of special creation 2) in his theory […]

1) which component in an operon is incorrectly matched with its function? a. promoterwhere rna polymerase first binds to dna b. regulator genebinds to the repressor protein c. structural genemakes mrna by transcription d. operatorif not bound to repressor, allows […]

1) gene mutation occurs at any time, without respect to the mutation’s adaptive value or benefit to the organism. 2) plants that conduct c-4 metabolism are desert plants. Answer: true 3) scientists estimate that at least 50-60% of all species […]

1) farmers have been able to genetically engineer a wide variety of crops that possess an enormous diversity of traits. if a farmer wanted to increase the ability of his crops to access ground water that is several meters below […]

1) although there is no connection between the female urinary and reproductive tracts, there is a connection in males because a. urine is produced in the nephrons and sperm is produced in the ureters. both then pass through the urethra […]

1) polygenic traits such as height or weight are often influenced by the environment of the organism. 2) migratory birds store energy as glycogen which is lighter than fat. Answer: false 3) the hemocoel is an open space in an […]

1) match the items below with their descriptions: art-based; matching use figures a, b and c to identify the three most common prokaryote shapes. 1> figure b a. spirochetes or spirilla 2> figure a b. cocci 3> figure c c. […]

1) what are the potential consequences if a person’s kidney suddenly stopped secreting the normal hormones? a. the person would have trouble regulating their blood volume and pressure due to the imbalance of salt in the blood stream. b. there […]

1) selective reabsorption of glucose and amino acids occur in the ____ of the nephron. a. glomerulus b. distal convoluted tubule c. proximal convoluted tubule d. collecting duct e. loop of the nephron (loop of henle) 2) nonspecific defenses against […]

1) which statement is not true about dna replication in eukaryotes? a. replication of the entire genome takes about ten minutes. b. a replication fork occurs at each growing point of the replicating chromosome(s). c. eukaryotes have many different chromosomes, […]

1) saturated fatty acids and unsaturated fatty acids differ in: a. the number of carbon-to-carbon bonds b. the consistency at room temperature c. the number of hydrogen atoms present d. all of the choices are differences between saturated and unsaturated […]

1) which of the following statements about asexual reproduction is not true? a. asexual reproduction occurs with only one parent. b. asexual reproduction is less commonly used by vertebrates. c. asexual reproduction can occur by budding or by division and […]

1) the germinating corn seed pictured below is displaying a. negative gravitropism. b. positive gravitropism. c. thigmotropism. d. negative phototropism. e. positive phototropism. 2) the frequent change in hiv surface proteins is a type of a. coevolution. b. parasitism. c. […]

1) if the mean annual precipitation of a region, currently characterized by grasslands, was to increase by 50 cm per year, what type of biome(s) would evolve in that region? a. temperate forests b. savanna c. deserts and tropical rainforests […]

1) a polysaccharide is a polymer made up of which kind of monomers? a. simple sugars b. amino acids c. nucleotides d. alternating sugar and phosphate groups e. fatty acids and glycerol 2) what is the path of an excreted […]

1) an extracellular matrix helps some cells to adhere to neighboring cells. 2) during the replication of dna, dna polymerase has to synthesize the daughter strand in the 5′ to 3 direction because dna polymerase can only join nucleotides to […]

1) the genetics inherited by an individual will completely control their behavior. 2) male birds often perform a special dance or set of physical displays to attract females. this would be an example of a behavioral isolation mechanism. Answer: true […]

1) which of the following stages occurs immediately after the development of the zygote? a. the development of the proembryo. b. the development of globular stage. c. the torpedo stage embryo forms. d. the heart stage when the cotyledon develops. […]

1) in gymnosperms and angiosperms, seeds disperse the _________ stage of the life cycle and in mosses and ferns, spores disperse the ___________ stage of the life cycle. a. sporophyte; sporophyte b. gametophye; sporophyte c. sporophyte; gametophyte d. microsporocytes; megasporocytes […]

1) which of the following lists correctly traces the path of a sound vibration as it moves through the ear? a. auditory canal-tympanic membrane-malleus-incus-stapes-oval window-cochlea-cochlear nerve b. auditory canal-malleus-incus-stapes-tympanic membrane-oval window-cochlea-cochlear nerve c. auditory canal-tympanic membrane-malleus-incus-stapes-cochlea-oval window-cochlear nerve d. auditory […]

1) in older, woody plants, the epidermis of the stem is replaced by a. trichomes. b. tracheids. c. collenchyma. d. periderm. 2) what consequences could arise if the field of bioinformatics ceased to exist as a field of study? a. […]

1) in the near future, the human population is predicted to involve a. a worldwide decrease in population growth due to limited resources. b. an increase in population growth in all countries in the world. c. a decrease in growth […]

1) which of the following substrates are required to run cellular respiration? a. glucose & oxygen b. glucose & carbon dioxide c. sunlight & oxygen d. energy & glucose 2) trace the path of an inhaled air molecule in a […]

1) only one of the four daughter cells becomes a functional gamete in spermatogenesis. 2) sustainable development is a pattern of resource use that attempts to preserve the environment while meeting the needs of humans in the present and future. […]

1) essential plant nutrients include carbon, potassium, calcium, and nitrogen. 2) the cephalochordates possess an atrium that is used to filter microscopic food particles out of the water. Answer: true 3) the cylinders in this experiment represent a 24-hour period. […]

1) which does not occur in telophase? a. cytokinesis is under way. b. the nuclear envelope is being reconstructed. c. the centromeres split apart. d. chromosomes de-condense into chromatin. e. the nucleolus reforms. incorrect 2) which of the following reflect(s) […]

1) which of the following would result in reproductive isolation? a. two populations of crickets are indistinguishable in physical features, but the females in each group only come to the different songs of their males. b. fruit flies on one […]

1) when conditions are unfavorable, some gram positive bacteria form a. pili. b. endospores. c. galls. d. capsules. e. thylakoids. 2) if the ureter was blocked due to the development of a tumor preventing the normal flow of urine,which region […]

1) which european species is believed to have evolved from homo ergaster? a. homo heidelbergensis b. homo erectus c. homo floresiensis d. homo sapiens e. australopithecus africanus 2) which of the following statements concerning ribosomes are true? a. several ribosomes […]

1) to determine the age of fairly recent fossils and organic artifacts, it is possible to analyze the amounts of the isotopes 14c and 14n, because over time the 14c-which originated in the atmosphere-breaks down into 14n. what net change […]

1) which of the following features is common among the roundworms as well as the arthropods? a. periodically shed their outer covering. b. radial symmetry. c. endoskeleton. d. undergo metamorphosis. e. segmentation is readily apparent. 2) fossils are considered to […]

1) which organisms use negative pressure to move air into the lungs? a. ducks b. iguanas c. humans d. mice e. all of these use negative pressure to move air into their lungs. 2) the electron transport chain and chemiosmosis […]

1) analysis of the nutrient content of phloem is performed on phloem sap that is made available when an aphid is cut away from its stylet. 2) the cylinders in this experiment represent a 24-hour period. the light area represents […]