A lizard's bobbing dewlap (a colorful flap of skin hanging from an Anolis lizard's throat) is an example of a(n) _____
A) stimulus
B) reflex
C) signal
D) innate releasing mechanism
E) structure necessary for respiration
Answer: C
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Hooker’s evening primrose keeps its flowers
closed until the early evening when they open. This is an example of
a. phototropism. b. vernalization. c. a circadian rhythm. d. photoperiodism. e. apical dominance
A(n) ______ infection occurs when a microbe enters a specific tissue, infects it, and remains confined there.
Fill in the blank(s) with the appropriate word(s).
Stress increases the risk of heart disease because unused fat cells released during the stress response may _____.
A. erode the muscles of the heart B. force the heart to beat too rapidly C. be deposited on and block coronary arteries D. increase HDL cholesterol levels
River blindness is
A. caused by a blood fluke. B. caused by Wuchereria bancrofti. C. transmitted by mosquito vector. D. a disease in which worms can invade the eyes. E. All of the choices are correct.