The parts of the graph indicated between points C and E represent
A) depolarization.
B) hyperpolarization.
C) the absolute refractory period.
D) repolarization.
E) sodium channel activity.
Answer: D
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Postzygotic reproductive isolation prevents
A. fertilization. B. formation of gametes by one of the parents. C. male gametes from joining with female gametes. D. All of the answer choices are correct. E. genetic exchange between populations by selecting against hybrid offspring.
Which of the following techniques involves using tiny DNA-covered spheres of gold or other metals to deliver transgenes into plant or animal cells?
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A useful scientific hypothesis is one that is:
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