In terms of function, the "opposite" of a polymerase is a
a. ligase.
b. phosphatase.
c. ?-galactosidase.
d. nuclease.
e. luciferase.
Ans: d
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Pure-breeding yellow guinea pigs crossed with purebreeding
white ones produce only cream-colored offspring. This pattern indicates incomplete dominance. Rough hair is found to be dominant to smooth hair. Give the F1 and F2 genotypic and phenotypic ratios of a cross of a smooth, white guinea pig with a homozygous, rough, yellow guinea pig. What will be an ideal response?
Low-growing, hardy plants of the ____________________ occur at high latitudes, where there is a layer of ____________________.
Fill in the blank(s) with the appropriate word(s).
Which of the following is NOT treated with antibiotics?
A) plague B) tularemia C) Lyme disease D) Ebola E) anthrax
Many species of snakes lay eggs, but in the forests of northern Minnesota where growing seasons are short, only live-bearing snake species are present. This trend toward species that perform live birth is an example of
A) natural selection. B) sexual selection. C) species selection. D) goal direction in evolution