When solutes are unloaded from phloem, water ____
a. is pumped into the phloem by active transport
b. leaves the xylem by osmosis
c. moves into the phloem by facilitated diffusion
d. is pumped out of the phloem by active transport
e. leaves the phloem by osmosis
ANSWER: e
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The buildup of genetic differences between isolated populations is
a. gene flow. b. genetic equilibrium. c. divergence. d. adaptation. e. natural selection.
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What will be an ideal response?
Which of the following is not a required property of living systems?
A. made of one or more cells B. engages in homeostasis and metabolism C. passes hereditary material to offspring D. dependence on water E. contains genetic material in a nucleus
Who first described cells?
A. Leeuwenhoek B. Hooke C. Linnaeus D. Darwin E. Golgi