Natural selection results in
a. adaptation.
b. a mutation.
c. a new species.
d. genetic drift.
e. stabilizing selection.
A
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Which of the following statements about species, as defined by the biological species concept, is (are) correct? I. Biological species are defined by reproductive isolation. II. Biological species are the model used for grouping extinct forms of life. III. All members of a species can potentially interbreed.
A) I and II B) I and III C) II and III D) I, II, and III
Post-translational regulation of an enzyme's activity, such as glutamine synthetase, can be finely controlled at varied levels due to
A) the varied strengths metabolite-regulating compounds can have with the enzyme such as hydrogen bonding, covalent bonding, and van der Waals attractions. B) having multiple independently functional subunits. C) the structural strength enzymes have once properly folded compared to short-lived and easily degradable transcripts during translational regulation. D) weak chemical modifications of the enzyme rather than harsh protein-protein or protein-DNA interactions.
Which of the following is an enzyme which results in Staphylococcus aureus being more invasive than Staphylococcus epidermidis?
A) lipase B) M protein C) hyaluronidase D) pyrogens E) neuraminidase
What kinds of angiosperms have reverted to wind pollination?
A. grasses B. oaks C. birches D. All of these are correct.