Nucleotides are monomers of ____
a. complex lipids
b. proteins
c. polysaccharides
d. nucleic acids
e. cellulose
ANSWER: d
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Lichens are a mutualistic association of a fungus and either an alga or a cyanobacterium in which
A) the fungus protects the photosynthetic partner from erosion. B) the fungus slowly engulfs the photosynthetic partner. C) the fungus helps collect sunlight for the photosynthetic partner. D) the phototroph provides phosphorus to the fungus.
If a population shows little or no evolutionary change for millions of years it is said to be in a state of ________
a. adaptive radiation b. stasis c. extinction d. decline e. evolution
Highly acidic gastric secretions are kept from leaking out of the stomach by
a. desmosomes. b. tight junctions. c. adhering junctions. d. gap junctions. e. intercalated discs.
During the __________ epoch, the mammals experienced an explosive adaptive radiation
a. Holocene b. Paleocene c. Pleistocene d. Eocene e. Pliocene