M 34. An X-linked carrier is a
a. homozygous dominant female.
b. heterozygous female.
c. homozygous recessive female.
d. homozygous male.
e. heterozygous male.
Answer: b
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Viral tissue specificities are called ________.
A. ranges B. virions C. uncoating D. tropisms E. receptacles
Despite selection against chromosomal variations,
A) related species almost always have the same karyo type. B) related species almost always have different karyo types. C) closely related species diverge by many chromosomal rearrangements. D) distantly related species diverge by only a few chromosomal rearrangements.
Barringer Crater in Arizona was formed when a
300,000-ton asteroid slammed into Earth 50,000 years ago. Which of the following is true about this event? a. It hit so early that it had little influence on the history of life. b. This one produced about 150 times the energy of the bomb that hit Hiroshima. c. Its impact produced a minor crater. d. Scientists recently disproved that an asteroid impacted our planet just prior to the mass extinctions at the K-T boundary. e. An asteroid impact releases only minor amounts of energy.
Antimicrobial peptides can do all of the following except
A) stimulate leukocytes. B) regulate body temperature. C) insert themselves into target cell membranes. D) disrupt plasma membrane and/or cell wall. E) target intracellular components.