The respiratory surface of insects are found in
their
a. lungs.
b. gills.
c. trachea.
d. skin.
e. gastrovascular cavities
C
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Mutations
a. increase genetic diversity b. decrease genetic diversity c. have no effect on genetic diversity
The secondary structure of a protein forms ____
a. pleated sheets or coils b. when pleated sheet regions fold back on themselves c. from interactions between polypeptide chains d. from covalent bonding between amino acids e. a functional chromatin uni
Individual species will continually evolve as a result of which evolutionary mechanism?
a. gradualism b. coevolution c. natural selection d. convergent evolution e. punctuated equilibrium
Hormones are effective because they are
A. recognized by specific receptors. B. faster than nervous impulses. C. each effective on every cell in the body. D. produced by the body.