CLEP BIOLOGY EXAM STUDY GUIDE

In which of the following ways do social insects benefit most from having several types or castes within the species? - Answer-The specialized structure of each caste permits division of labor and greater efficiency The greatest diversity of structure and of methods of locomotion is exhibited in the individuals of - Answer-a phylum Of the following, which is an example of a mutualistic relationship? - Answer-The protozoan Trichonympha digesting wood in the gut of a termite Evidence that multicellular green plants may have evolved from green algae is best supported by the fact that in both - Answer-chlorophylls a and b are photosynthetic pigments All of the following statements concerning the light-capturing reactions of photosynthesis are true EXCEPT - Answer-If captured, some of the energy of the excited electrons is used to split carbon dioxide into carbon and oxygen. Which of the following statements best explains the hypothesis that the development of sexual reproduction has resulted in acceleration of the rate of evolution? - Answer-Sexual reproduction is more likely to result in genetic recombination than is asexual reproduction. A frog skeletal muscle contracts in response to an electrical stimulus. Increase of the stimulus intensity by 50 percent will increase the strength of response nearly 50 percent. If the intensity is again increased 50 percent, the response will increase only about another 25 percent. Further increase in the stimulus intensity produces no further increase in response. - Answer-The fibers of a muscle have varying thresholds for response Nitrogen-containing waste products are excreted as the result of the metabolism of which of the following? - Answer-Proteins Deposits of coal in Greenland and the Antarctic indicate that - Answer-these regions were once thickly vegetated Thirst, loss of weight, and sugar in the urine result from the undersecretion of a hormone by which of the following glands? - Answer-Pancreas Considering the role of mitochondria in cells, mitochondria would likely be most abundant in which of the following? - Answer-Cells of the heart muscle All of the following statements about enzymes are true EXCEPT - Answer-Enzymes can function only within living cells. Which of the following is critical in limiting the size to which an animal cell may grow? - Answer-The ratio of cell surface to cell volume Which of the following best describes the effect on heart action of the stimulation of the parasympathetic nerve fibers of the vagus nerve? - Answer-There is a decrease in the heartbeat rate. If poorly drained soils encourage the growth of bacteria that convert nitrate to nitrogen, the effect on higher plants will be to - Answer-decrease protein production A patient is placed on a restricted diet of water, pure cooked starch, olive oil, adequate minerals, and vitamins. If a urinalysis several weeks later reveals the presence of relatively normal amounts of urea, the urea probably came from the - Answer-deamination of cellular proteins The codon for a particular amino acid is 5'CAU3'. The DNA sequence that complements this codon is - Answer-3'GTA5' Viral DNA would be most likely to contain genes that code for - Answer-viral-coat protein Which of the following statements about imprinting is NOT true? - Answer-The behavior pattern associated with imprinting is the result of reward or punish