All of the members of the same species occupying the same area at the same time constitute a(n):

a. individual
b. population
c. community
d. ecosystem
e. biosphere


b

Biology & Microbiology

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In streams and rivers, most of the microbial biomass is ________.

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__________ are electrically excitable cells that signal other cells by means of chemical messages. Fill in the blank(s) with the appropriate word(s)

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