The biological species concept of Ernst Mayr cannot be applied to 

A. sympatric organisms.
B. allopatric organisms.
C. eukaryotic organisms.
D. prokaryotic organisms.
E. asexually-reproducing organisms.


E. asexually-reproducing organisms.

Biology & Microbiology

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Activities associated with the parasympathetic division of the autonomic nervous system include

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Which chemicals are natural pain suppressors?

a. substance P b. bradykinins c. prostaglandins d. histamine e. endorphins

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Which species lives in “disturbed habitats”?

a. fish b. deer c. insects d. humans e. birds

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Nutrients that encourage the growth of beneficial microbes in the intestines are called ________.

Fill in the blank(s) with the appropriate word(s).

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