Describe what a typical wind-pollinated flower looks like. Fill in the blank(s) with the appropriate word(s)
ANSWER: Wind-pollinated flowers are typically small, nonfragrant, and green, with large stigmas and
insignificant petals or sepals. Wind disperses pollen randomly throughout the environment,
so these flowers typically make and release pollen grains by the billions, insurance in
numbers that some of their pollen will reach a receptive stigma.
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A tube foot of a sea star moves when the small muscular bulb called the ____ contracts, forcing fluid into the tube foot
a. ampulla b. ossicle c. radial canal d. ring canal e. madreporite
The result of natural selection is changes in
a. individuals. b. populations. c. kingdoms. d. phyla. e. animals only
Which of the following is NOT a cause of mutation?
A. Errors in DNA replication B. Errors during meiosis C. Exposure to radiation D. Exposure to tobacco E. All of the choices are causes of mutations.
Which organizational unit includes the fewest species of organisms?
a. class b. biosphere c. community d. population e. ecosystem