Proteins may have been the first information-storage molecules because they can self-replicate as well
as catalyze reactions.
What will be an ideal response?
ANS: F, RNA
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For a folding domain that forms a sort of "fist" with certain amino acid R groups buried within and other R groups facing out, the hydrophobic R groups mainly face "out" and the hydrophilic R groups mainly face "in"
a. true b. false
If the curve shifts to the left or to the right, there is no gene flow, and the population size consequently increases over successive generations, then which of these is (are) probably occurring?
1. immigration or emigration 2. directional selection 3. adaptation 4. genetic drift 5. disruptive selection A) 1 only B) 4 only C) 2 and 3 D) 4 and 5 E) 1, 2, and 3
An optimal strategy for an animal in procuring food would involve all of the following EXCEPT:
a. securing essential nutrients. b. maximizing the size of each prey item. c. minimizing the risk of predation during foraging and feeding. d. maximizing energy gained. e. minimizing energy expended.
The type of ecosystem that can be found bordering the tropics worldwide and is characterized by huge herds of grazing animals is a
A. temperate rain forest. B. prairie. C. savanna. D. taiga.