Which of the following plant hormones affect(s) development in the plant body? I) auxin II) cytokinin III) gibberellin
A) I
B) I and II
C) III
D) I, II, and III
D
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So far, three classes of chromatin remodeling complexes have been identified. Which of the following pairings is correct?
A. SWI/SNF complexes ? activation B. SMC complexes ? repression C. ISWI complexes ? activation D. Mi2/NURD ? activation E. SWI/SNF complexes ? repression
How many different codons are part of the genetic code?
a. 4 b. 16 c. 32 d. 64 e. 128
A biologist studied a population of squirrels for 15 years. During that time, the population was never fewer than 30 squirrels and never more than 45. Her data showed that over half of the squirrels born did not survive to reproduce, because of both competition for food and predation. In a single generation, 90% of the squirrels that were born lived to reproduce, and the population increased to 80. Which inference(s) about this population might be true?
A. The amount of available food may have increased. B. The parental generation of squirrels developed better eyesight due to improved diet; the subsequent squirrel generation inherited better eyesight. C. The number of predators that prey upon squirrels may have decreased. D. A and C could be true. E. A, B, and C could be true.
If a hiker picked up a mollusk on a trail in a rain forest, what class would it belong to?
A. Cephalopoda B. Bivalvia C. Gastropoda D. Polyplacophora