The discovery of a coelacanth in South Africa in 1938 was surprising to biologists because it
A) was thought to be extinct.
B) was a newly evolved species.
C) represents a transition between two major groups of fishes.
D) is the first species to have made the transition to land.
E) has not evolved for more than 80 million years.
A
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Using Chargaff's rules, you can determine that an the DNA of organism that contains 30% adenine would contain ____________ guanine
A. 20% B. 30% C. 40% D. 60% E. 70%
The volume of air in the lungs at rest, between breaths, is called
A) inspiratory reserve volume. B) vital capacity. C) inspiratory capacity. D) functional residual capacity. E) tidal volume.
The inheritance of eye color indicates that
A) many different genes determine eye color, each contributing to different degrees. B) eye color is sensitive to what a pregnant woman eats. C) other characteristics, such as the texture at the back of the eye, can affect the phenotype. D) a person's sex influences inheritance of eye color.
The enzyme that builds a short complementary piece of RNA at the start of each DNA segment to be replicated is
A. ligase. B. DNA polymerase. C. ATP synthase. D. helicase. E. primase.