Predators often avoid a mimic species because of
a. its bad taste.
b. its toxic secretion.
c. its resemblance to a model species.
d. its painful sting.
e. all of these.
Answer: c
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The component(s) of E. coli RNA polymerase responsible for promoter recognition is/are referred to as:
A. sigma factor. B. the TATA box. C. the mediator complex. D. an enhancer. E. transcription factors.
Based on mortality rates shown in Figure 46.11, which stage of the lime swallowtail life cycle would you expect to be the shortest?
A. the egg stage B. the larval stage C. the pupal stage
In seeds, the shift from active metabolism to dormancy, and then reactivation and germination is based
on levels of
a. a number of hormones. b. the temperature response of hormones. c. antagonistic hormone action. d. abscisic acid. e. temperature.
How are receptor tyrosine kinases and steroid hormone receptors similar?
A. Both are transmembrane proteins with a single transmembrane domain B. Both have a site for binding ligand C. Both are activated by autophosphorylation D. Both have a DNA-binding domain