Active transport requires
A) cellular energy, usually in the form of ATP.
B) thermal energy from the environment.
C) hormonal activation of specific protein carriers.
D) the initial movement of water by osmosis to develop a favorable concentration gradient.
Correct Answer:
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Q15: The following figure shows the movement of
Q16: The following figure illustrates a plasma membrane.
Q17: One of the major functions of the
Q18: A cell that is gaining water from
Q19: Imagine two solutions separated by a selectively
Q21: Cell surface receptors of chemical messages are
Q22: Imagine a cell needing an essential specific
Q23: A white blood cell at the site
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Q25: Multicellular organisms have various specialized cells because
A)
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