Which individuals will be LEAST favored when selection pressures acting on a population result in stabilizing
selection?
a. individuals at the lower end of the range of variation only
b. individuals at the upper end of the range of variation only
c. individuals distributed randomly within the range of variation
d. the intermediate individuals within the range of variation
e. extreme individuals at both ends of the range of variation
ANSWER: e
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Some archaea have unique phospholipids in their cytoplasmic membrane that
A) form a monolayer due to the presence of diglycerol tetraethers. B) form a bilayer due to the presence of sterols. C) form a stable ring structure due to the presence of crenarchaeol. D) form a bilayer due to the presence of phosphatidylethanolamine.
Triacylglycerols are used primarily for:
A. energy storage. B. information storage. C. cell membrane biosynthesis. D. biological catalysis. E. movement.
The ability of predators to eat and digest prey
determines the number of prey captured as is shown in a. type I response. b. type II response. c. type III response. d. types I and II. e. none of these.
It is essential for heart muscle cells to beat in a coordinated fashion. The cell junctions that would best facilitate this are
A) basal bodies. B) anchoring junctions. C) tight junctions. D) gap junctions.