Fossils include

a. skeletons.
b. shells.
c. seeds.
d. tracks.
e. all of these.


Answer: e

Biology & Microbiology

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Although symbiotic relationships between nitrogen-fixing bacteria and plants are rare, many plants have symbiotic relationships with  

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Some scientists believe that RNA was the first information storage molecule because ____

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Differential survival and reproduction of individuals of a population that vary in the details of shared traits is called

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

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Estrogen and progesterone exhibit which type of hormone interaction?

a. synergistic b. permissive c. opposing d. unrelating e. mutual

Biology & Microbiology