If a scientist is conducting a study of how an animal's senses provide a physiological basis for a particular behavior, what type of causation is she exploring?
A. ultimate causation
B. proximate causation
C. stereotyped causation
D. ethnological causation
E. fixed action pattern causation
B. proximate causation
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Very low concentrations of detergent make membranes leaky to small molecules and ions without damaging proteins. In isolated mitochondria exposed to detergent, the molecules of the electron transport chain and of ATP synthase remain intact
Do you expect ATP synthesis to continue in the presence of low concentrations of detergent? A. Yes, because all enzymes and electron carriers are functional. B. No, because with a leaky membrane, H+ gradient cannot be maintained. C. No, because leaky membranes do not allow NADH and FADH2 to donate their electrons to the electron transport chain. D. because leaky membranes inhibit glycolysis.
Which of the following statements about the nitrogen cycle is true?
A) The nitrogen cycle requires different types of bacteria. B) Nitrogen gas is converted to nitrates in plant leaves. C) Nitrogen cannot be cycled through living organisms. D) When plants and animals die, nitrogen is removed from the nitrogen cycle
During each PCR cycle, what happens to the number of copies of a DNA segment?
A.) It stays the same. B.) It doubles. C.) It quadruples. D.) It increases to 1 billion.
Cytotoxic T cell response the cells of the pancreas may result in
A. type I diabetes. B. Graves' disease. C. Bruton-type agammaglobulinemia. D. DiGeorge syndrome. E. hemolytic anemia disease.