Which of the following best explains why bees aren't attracted to red flowers?
A. Red flowers are imperfect and do not produce pollen.
B. Bees perceive red as a warning signal.
C. Bees can't see red.
D. Red flowers usually are odorless.
E. Red flowers do not produce nectar.
Answer: C
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A virus that kills its host is said to be
A) lytic or virulent. B) temperate. C) lysogenic. D) virulent or lysogenic, but not temperate.
Charles Darwin and his son experimented with which plant growth response?
A. gravitropism B. circadian rhythms C. phototropism D. heat shock E. thermotropism
Those organisms that can swim strongly against ocean currents are called:
a. plankton. b. neuston. c. nekton. d. macroplankton. e. epifauna.
_________ occur where winter drought reduces photosynthesis and most trees drop their leaves
a. Tropical montane forests b. Tropical deciduous forests c. Boreal forests d. Dry savannas e. Temperate forests