Some insects
a. lack wings.
b. mature without undergoing metamorphosis.
c. are highly social.
d. have mouth parts specialized for bloodsucking.
e. fit all of these descriptions.
Answer: e
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Cytoplasmic inheritance refers to genes found in ____
a. sex chromosomes b. mitochondria and chloroplasts c. viruses d. bacteria e. linkages
DNA varies from species to species in
a. how much adenine binds with thymine rather than with cytosine. b. whether DNA is a double or a single helix. c. the variation in the backbone structure. d. how many different bases it contains. e. its sequence of DNA base-pairs
Four of the five structures listed below are
nonreproductive parts of a flower. Select the exception. a. calyx b. anther c. corolla d. petal e. sepal
In most male animals, the penis or other copulatory organ achieves erection by
A. artery dilation or hemolymph pressure. B. bones or exoskeleton interlocking. C. muscle contraction. D. testicular pressure.