The head of a sperm is capped with an organelle that contains glycoprotein-digesting enzymes. What is this organelle called?
A. zona pellucida
B. acrosome
C. granulosa
D. blastula
E. neural cap
B. acrosome
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For filtration to take place through the fenestrated capillaries of the renal corpuscle, _____
A) the concentration of ions must be greater in the capillaries (the glomerulus) than in the renal tubule B) there must be a greater pressure inside the glomerulus than in the renal tubules C) there must be a larger concentration of proteins in the renal tubule than in the glomerulus D) there must be more than one capillary bed in the renal corpuscle
The biochemical profiles of the stomach contents of herbivores, omnivores, and carnivores are qualitatively and quantitatively different
a. True b. False
You observe a 1-inch-tall plant in the woods. This plant is part of a mass of similar small plants covering an area of several square feet. It is very flexible and does not easily stand upright by itself
Upon examining the tiny, flat, leaflike structures of this plant, you see no veins. There is no evidence of seeds, but at the end of a little stalk on the tip of the plant, there is some sort of spore-bearing structure. This plant is probably a(n) A) alga. B) gymnosperm. C) bryophyte. D) angiosperm. E) fern.
To sterilize heat-sensitive solutions such as special culture media, enzymes, and vaccines, one should use
A. dry heat. B. an autoclave. C. filtration. D. pasteurization.