Hybrid inviability and hybrid sterility are reproductive isolating mechanisms that are termed:a
homozygotic barriers.
b. prezygotic barriers.
c. heterozygotic barriers.
d. postzygotic barriers.
e. homozygotic barriers.
D
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When added to water at neutral pH (7.0), an acid will
a. act as a proton donor, raising the pH of the solution. b. act as a proton acceptor, raising the pH of the solution. c. act as a proton donor, lowering the pH of the solution. d. act as a proton acceptor, lowering the pH of the solution. e. do nothing since the aqueous solution is neutral.
The collection of sperm from a male and the use of that sperm to impregnate a female of the same
species is called:a. host mothering. b. artificial insemination. c. in situ conservation. d. in vitro fertilization. e. ex situ conservation.
How does blood enter the heart?
A) as paracardial fluid B) through the pulmonary arteries C) from the aorta D) by means of the capillaries surrounding the heart E) via the vena cava
Important characteristics of antimicrobic drugs include
A. high toxicity against microbial cells. B. readily delivered to the site of infection. C. do not cause serious side effects in humans. D. remains active in body tissues and fluids. E. All of these choices are correct.