Adaptive behavior has probably been selected by evolutionary processes because it
A. allows the animal to produce the largest number of viable offspring.
B. allows the animal to live in the widest variety of environments.
C. makes the animal the smartest.
D. allows the animal to live the longest.
E. All of the choices are correct.
Answer: A
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It is proposed that Cro-Magnons were responsible for the extinction of many large mammals during the Pleistocene epoch. How could this feat have been accomplished?
A. Cro-Magnon man was the first species of hominids to hunt in groups. This would have increased their chance of killing larger animals. B. Cro-Magnon man was the first species of hominid to use fire. This would have increased their success during hunting. C. Cro-Magnon man was the most efficient bipedal species. They would have been able to run after prey species more efficiently than any of their predecessors. D. Cro-Magnon man had an increase in tool technology that enabled them to kill animals from a distance.
In Table 8.1, what will be the result of conjugation between cultures 1 and 2?
A) 1 will remain the same; 2 will become F+, leucine-, histidine- B) 1 will become F-, leu+, his+; 2 will become F+, leu-, his- C) 1 will become F-, leu-, his-; 2 will remain the same D) 1 will remain the same; 2 will become F+, leu+, his+ E) 1 will remain the same; 2 will become F+ and recombination may occur
If you applied a toxin that blocked non-voltage-gated potassium channels (i.e., the potassium "leak channels") in a resting neuron, it would cause the membrane potential to be
A. less negative. B. more negative. C. No change would be observed.
The enzyme used by retroviruses to make a DNA copy of their RNA genome is called ________.
A. reverse transcriptase B. RNA replicase C. RNA polymerase D. DNA polymerase