The high incidence of Ellis–van Creveld syndrome among the Old Order Amish population is caused by ____
a. a population bottleneck
b. artificial selection
c. sexual selection
d. inbreeding
e. random mating
ANSWER: d
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A bacterial cell that contains teichoic acid stains which color on the Gram stain?
a. Pink b. Red c. Green d. Purple
Like directional selection, sexual selection pushes phenotypes toward one extreme
a. True b. False
Downward bending of a seedling root can be blocked
by a. moving it to a dark room. b. auxin transporters. c. auxin transport inhibitors. d. mutations in genes that code for auxin transport proteins. e. auxin transport inhibition and mutations in genes that code for auxin transport proteins.
A portion of the ____, which must monitor the blood, is not subject to the blood brain barrier
Fill in the blank(s) with the appropriate word(s).