Which isolating mechanism is postzygotic?
A. hybrid sterility
B. ecological isolation
C. temporal isolation
D. mechanical isolation
E. behavioral isolation
Answer: A
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If a kelp farmer wanted to maximize her harvest, which type of echinoderm would she be most concerned about in the habitat?
A) sand dollars B) brittle stars C) sea stars D) sea urchins E) sea cucumbers
What is the plasma membrane's function in the cell?
a. It regulates the movement of water into and out of the cell. b. It regulates the movement of ions into and out of the cell. c. It regulates the movement of organic molecules into and out of the cell. d. All of the above.
If a hormone-secreting cell is affected by the hormone that it synthesizes, the hormone is said to be:
A) autocrine B) endocrine C) paracrine D) nanocrine
Which one of the following is NOT an isomer of the others?
