The elongation of stems is stimulated by
A. auxin only.
B. gibberellin only.
C. ethylene only.
D. auxin and gibberellin.
E. auxin and ethylene.
D. auxin and gibberellin.
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Some insects that have an unpleasant taste, such as monarch butterflies, have bright, high-contrast color patterns. Most predators, once they have tasted a monarch, will leave all other monarchs alone in the future
What type of learning has occurred in the predators? A) Imprinting B) Altruism C) Insight learning D) Habituation E) Operant conditioning
Which of the following structures allows a cell to survive adverse environmental conditions?
a) Capsule b) Carboxysome c) Endospore d) Gas vacuole
Population growth of rabbits in Australia can best be described as
a. fast. b. exponential. c. virulent. d. stable. e. epidemic.
The process by which species cease to exist
A. All of the answer choices are correct. B. is endangerment. C. is speciation. D. is extinction. E. has never occurred.