Blood types (A, B, and O) are controlled by
a. sex-linked genes.
b. linked genes.
c. multiple genes.
d. multiple alleles.
e. single alleles.
D
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Your friend is having difficulty keeping track of the energy flow from glucose through glycolysis, the Krebs cycle and electron transport. Your best advice would be to
A. follow ATP production. B. follow the protons. C. follow NAD+ production. D. follow the electrons.
Which statement is true of the female gametophyte of pine?
(a) It’s a product of repeated cell divisions of the functional megaspore. (b) It’s haploid. (c) It serves as the stored food to be used by the embryo sporophyte upon germination. (d) All of the above are true.
The density of air increases with:
a. increasing temperature. b. decreasing pressure. c. increasing moisture. d. decreasing moisture.
Which term best describes the concept that molten rock emanates from the edge of a plate on the Earth's crust, pushing rock on the other side into a trench?
a. the theory of uniformity b. plate tectonics c. hot spots d. fault line rupture e. biogeography