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• 8. The oxygen consumed during cellular respiration is involved directly in which process or event?(A
• 17. Which of the following statements describes chromatin?(A)Heterochromatin is composed of DNA, whe
• 26. In what type of environment is a scientist most likely to find examples of ongoing speciation?(A
• 9. CAM (crassulacean acid metabolism) plants such as cacti differ from standard C4 plants such as co
• 18. Which of the following would occur from a mutation in the gene's promoter region?(A)The seq
• 27. Why do some scientists believe that RNA, rather than DNA, was the first genetic material?(A)All
• 35. Which of the following is NOT a defining trait of the phylum Chordata?(A)notochord(B)vertebrae(C
• 10. All of the following occur during the mitotic (M) phase EXCEPT(A)cytokinesis.(B)fragmentation of
• 19. Based on the gene and protein sequences that follow, what type of mutation-polypeptide effect ha
• 28. If the mitochondria and chloroplasts in eukaryotic cells resulted from endosymbiosis, what featu
• 36. Which of the following is a plant growth response, not a behavioral response?(A)leaflet folding
• 45. The exceptionally large diversity of antigen receptors found on B cells and T cells is mostly th
• 11. Which of the following is WRONG concerning cancer cells?(A)They do not exhibit density-dependent
• 20. A mutation causes a gene to become overactive, contributing to uncontrolled cell growth. Which t
• 29. The plastids of the following are thought to be derived from ancestral red algae EXCEPT(A)green
• 37. Why is the amniotic egg considered an important evolutionary breakthrough?(A)It prolongs embryon
• 46. What is “matched” between donor tissue and recipient in order to increase likelihood of successf
• 12. Which of the following is true concerning human sexual life cycle?(A)Gametes are produced by mit
• 21. Why is there a need to produce Okazaki fragments on the lagging strand, but not on the leading s
• 30. The presence of which class of biological molecules would allow you to distinguish between an ad
• 38. Which of the following organ systems is INCORRECTLY matched with its function?(A)digestive—food
• 47. Which combination of axon features should lead an axon to communicate with downstream cells most
• 13. The major way that meiosis II differs from mitosis is that(A)in meiosis II, pairs of homologous
• 22. Humans have fewer than 21,000 genes, but human cells can make 75,000-100,000 different proteins.
• 31. Azidothymidine (AZT) is a nucleoside analog used to treat HIV infections. Which step does AZT ha