The matched pairs of chromosomes within a diploid organism, such as a human, are described as which of the following?
a. homologous chromosomes
b. heterologous chromosomes
c. gametic chromosomes
d. somatic chromosomes
a. homologous chromosomes
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Deserts caused by global patterns of air
circulation are dry because
a. as the moist air above deserts rise, all of the water evaporates b. dry, descending air above deserts draws moisture from the soil c. the moist air above deserts is absorbed by the sandy desert soils d. because of the warm temperatures, all the moisture in the deserts is drawn away and is transported by air currents to the tropics e. all of the air currents above deserts have no contact with bodies of water
One characteristic of class Bivalvia is that they:a
are active swimmers. b. use a radula to feed on algae. c. possess two shells with a hinge. d. use their mantle for locomotion. e. possess shells of overlapping plates
A primary source of carbon for photosynthetic organisms is:
a. carbon dioxide in the atmosphere and water. b. bicarbonate in the water. c. nitrate in the soil. d. dissolved phosphate in water. e. carbonic acid in rain.
Which of the following is not a lobe of the cerebral hemisphere?
A. reticular B. occipital C. temporal D. frontal E. parietal