Honeybees will sting a bear that is robbing their hive even though the bees will die after they sting the bear. This is an example of
A) submission. B) conditioning. C) altruism. D) habituation.
C
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Which of the following accurately describe(s) ectotherms compared to endotherms of similar size at similar body temperatures? (Select all correct choices.)
A. Ectotherm metabolic rates are about 25% those of endotherms. B. Ectotherms cannot sustain prolonged activity for as long as endotherms can. C. Ectotherms can survive much longer periods without food than can endotherms. D. Ectotherm metabolic rates decrease as body temperature increases. E. Ectotherms never reach activity levels of endotherms.
The atmosphere and seas of the early Earth lacked oxygen. What kind of organisms could NOT have lived under those conditions?
A. obligate aerobes B. obligate anaerobes C. facultative anaerobes D. chemoautotrophs E. cyanobacteria
Which of the following will decrease blood pressure?
a. increasing heart rate b. increasing stroke volume c. increasing vessel diameter d. increasing stress
Phy B may inhibit flowering in:
a. day-neutral plants. b. vernalized plants. c. long-day plants. d. senescing plants. e. short-day plants.