24. How does the pollination of most trees and grasses differ from the pollination of a flower? a. Trees and grasses pollinate in daytime; flowers pollinate in nighttime. b. Trees and grasses self-pollinate; the flower must get other pollen from other flowers. c. Trees and grasses are often pollinated by wind, flowers are often pollinated by insects. d. Trees and grasses have large, heavy grain pollen; flowers have small, fine grains of pollen.​.

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