Advances in molecular systematics show that whisk ferns and horsetails are the closest living relatives of
A. mosses.
B. seed plants.
C. club mosses.
D. ferns.
E. gymnosperms.
Answer: D
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In liver cells, the inner mitochondrial membranes are about five times the area of the outer mitochondrial membranes. What purpose must this serve?
A) It allows for an increased rate of glycolysis. B) It allows for an increased rate of the citric acid cycle. C) It increases the surface for oxidative phosphorylation. D) It increases the surface for substrate-level phosphorylation. E) It allows the liver cell to have more peroxisomes.
A woman visits her doctor's office complaining of pattern baldness. Her mother and father do not have pattern baldness, but her brother does. The doctor is concerned that she may have the serious condition of __, and he immediately orders blood tests to check her ________ levels.
A. tumor of the adrenal gland, 5-dihydrotestosterone B. tumor of the reproductive system, testosterone C. skin cancer, 2,5 alpha-reductase D. tumor of the adrenal gland, estradiol E. tumor of the reproductive system, 5-dihydrotestosterone
If ____ mutation(s) occur(s) in snails, the direction of coiling may reverse, which ____ mating
a. 1; encourages b. 1; prohibits c. 2; encourages d. 2; prohibits e. 3; encourages
Identify the primary functions of the muscles that form the rotator cuff.