The group of enzymes able to relax supercoils in DNA is called
A) primases.
B) helicases.
C) topoisomerases.
D) telomeres.
E) ligases.
C) topoisomerases.
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The rocky shore zone that has the greatest diversity
of life is the a. upper littoral. b. midlittoral. c. lower littoral. d. intertidal. e. neritic.
Aristotle believed that
A. all species are equal in complexity. B. living organisms can be arranged based on their order of increasing complexity. C. every species on Earth has a perfect or "essential" form. D. life originated from inorganic substances.
Which of the following explains why females are more likely to be "choosy" about mating partners than males?
a. Females are more limited in the number of offspring they can produce than males are b. Eggs require more energy to produce than sperm c. Males can fertilize the eggs of multiple females, while a female's egg can only be fertilized by a single male d. All of these
Of the nutrients needed for plant growth, active uptake of ________ regulates turgor pressure within cells of leaves.
A. carbon dioxide B. nitrogen C. oxygen D. ions