Which biome has a closed canopy?
a. tundra
b. taiga
c. tropical rain forest
d. desert
e. grassland
Answer: c
Biology & Microbiology
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TCRs recognize epitopes only after the immunogens have been partially degraded
Indicate whether the statement is true or false.
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Double fertilization occurs when
A. the sperm and tube nuclei fertilize the egg. B. two sperm cells fertilize the two polar nuclei. C. one sperm fuses with the egg and the other sperm fuses with both polar nuclei. D. the polar nuclei fuse with the egg after it has fused with the sperm.
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What contributes to the dryness, large daily temperature shifts, and salty soil of deserts?
What will be an ideal response?
Biology & Microbiology
The most common mode of pollination in angiosperms occurs by _____
a. birds b. wind c. water d. insects e. humans
Biology & Microbiology