A special structure on certain cyanobacteria for nitrogen fixation is called a(n):

a. ammonia cyst.
b. homocyst.
c. heterocyst.
d. nematocyst.
e. pneumatocyst.


C

Biology & Microbiology

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Each DNA strand serves as a _____during DNA synthesis

a. replicate b. substitute c. template d. source of nucleotides e. primer

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The first plants to colonize land were the

A. pteridophytes. B. bryophytes. C. gametophytes. D. lycophytes.

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A compound is two or more different kinds of atoms bonded together.

Indicate whether the statement is true or false. A. True B. False

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Bacterial endospores are used for

A) forming biofilms. B) bacterial reproduction. C) keeping the bacteria alive under harsh conditions. D) attracting viruses. E) bioremediation.

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