Life probably would never have emerged on
Earth if the ancient atmosphere had been the
same as the present one in regard to
a. carbon dioxide.
b. hydrogen.
c. oxygen.
d. nitrogen.
e. carbon monoxide
C
Biology & Microbiology
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Competition shapes communities because there are usually limited
A. species. B. resources. C. interactions. D. nutrients.
Biology & Microbiology
Cones are responsible for:a
night vision. b. the detection of movement. c. dim light vision. d. peripheral vision. e. the perception of fine detail
Biology & Microbiology
An example of insoluble fiber is ____.
A. glucose B. starch C. cellulose D. sucrose E. phospholipids
Biology & Microbiology
Eyes contain ____
A. chemoreceptors. B. mechanoreceptors. C. photoreceptors. D. nociceptors. E. thermoreceptors.
Biology & Microbiology