All steroids have ____.
A. the same number of double bonds
B. one or more fatty acids
C. four rings of carbon to which other atoms are attached
D. the same functional groups
E. the same number and positions of double bonds
Answer: C
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The diagram below depicts three phylogenetic trees. Which of the two show the same sister group relationships among groups A, B, and C?
A. 1 and 2 are equivalent. B. 2 and 3 are equivalent. C. 1 and 3 are equivalent. D. All 3 are equivalent. E. All 3 are differentâ€"no two are equivalent.
An inhibitor
A. denatures an enzyme. B. attaches itself to the product, thereby preventing the product from functioning. C. attaches itself to the enzyme, thereby preventing the enzyme from forming the enzyme-substrate complex. D. renders the enzyme inactive by attaching positively charged hydrogen ions to the enzyme's side chains.
In mammals, uric acid is produced as a waste product of the degradation of
A. proteins. B. lipids. C. polysaccharides. D. purine nucleotides.
The model below predicts that the begging level of full offspring (F) should essentially be zero, whereas hun-gry (H) and starving (S) offspring show intermediate and high levels of begging, respectively
Under what circumstances would we expect full offspring to start begging? a. When the fitness costs of begging are higher. b. When the fitness costs of begging are lower. c. Only when the fitness costs of begging increase in a nonlinear fashion with begging level. d. Under no circumstances; the full (F) individuals are by definition at begging level zero.