Water and small solutes are filtered under pressure out of the blood plasma into nephrons through the porous walls of ________, tufts of capillaries in the renal cortex.
A. Loops of Henle
B. juxtaglomerular apparati
C. glomeruli
D. vasa rectae
E. collecting ducts
Answer: C
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(a) both plant and animal cells. (b) only plant cells. (c) only animal cells. (d) none of the above.
Gram staining divides bacteria into ____
groups based on differences in the composition of their ____. a. two; DNA b. four; capsules c. two; cell walls d. four; cell walls e. two; plasma membranes
When one plant is shaded by another, why is the ratio of far-red to red light increased compared to an unshaded plant?
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The lac operon is usually in the _____ position and is activated by a/an _____ molecule.
A) on, repressor B) on, inducer C) off, repressor D) off, inducer