Natural selection ________.
A. prepares organisms for future changes in the environment
B. results in evolutionary adaptation
C. is a very rare phenomenon
D. does not affect allelic frequencies
B. results in evolutionary adaptation
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You construct a life table for a plant species and find that in all cases about the same proportion of the cohort survive to the beginning of the next time interval. What would you call this?
A. a Type I survivorship curve B. populations regulated by density-independent events C. a Type III survivorship curve D. a Type II survivorship curve E. a semelparous life history adaptation
Considering the table above, which of the following is likely true?
a. Eventually pharmaceutical companies will run out of options for the development of new anti-biotics. b. Eventually pharmaceutical companies will need to come up with new categories of antibiotics that work in ways not yet conceived. c. Physicians will need to work in local and globally coordinated ways to assure that newly de-veloped antibiotics are not overprescribed. d. All of the above. e. None of the above.
You isolate a plant that expresses a phytochrome mutant that is always in the Pfr form. You expect these plants will germinate
A. regardless of the light conditions. B. later than normal plants. C. similarly to normal plants. D. not at all.