Since the Krebs cycle is a cyclic pathway, the original acceptor needed to start the Krebs cycle and the end product of the Krebs cycle are
A. ATP molecules.
B. enzymes.
C. different molecules.
D. NADH and FADH2, respectively.
E. the same molecule.
E. the same molecule.
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Which of the following are the mechanoreceptors that detect motion and sense gravity?
A. baroreceptors B. stereocilia C. hair cells D. semicircular canals
Which of the following events is (are)
characteristic of the interphase?
a. The cytoplasm divides. b. The cell doubles its content. c. The cell doubles its content, and the cytoplasm divides. d. DNA is synthesized. e. more than one of these
How does the urinary system promote homeostasis?
What will be an ideal response?
A population of zooplankton is exposed to a small number of predatory fish that feed on the larger-sized (adult) zooplankton. Based on the principles of evolution by natural selection, which of the following would be most likely?
a. Adult zooplankton will start to reach sexual maturity when they are still relatively small b. The predatory fish will evolve smaller mouths so that they do not drive their prey to extinction. c. Evolution is unpredictable, and all outcomes are equally likely. d. The zooplankton will become sexually mature at larger sizes. e. The predatory fish will evolve poor eyesight so as to preserve their food supply.