Exchange across a membrane requires
a. moisture only.
b. transport proteins only.
c. pressure gradients only.
d. moisture and pressure gradients only.
e. moisture, pressure gradients, and transport proteins.
D
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What are root nodules?
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The lack of blood flow to an organ, as in the case of a blood clot blocking an artery, is termed ________
Fill in the blank(s) with correct word