The carbon dioxide needed for photosynthesis enters the plant through the:

a) roots.
b) thylakoid.
c) stroma.
d) root hairs.
e) stomata.


Ans: e) stomata.

Biology & Microbiology

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The portion of the nervous system that is associated with the control of involuntary activities is the

A) central nervous system. B) peripheral nervous system. C) autonomic nervous system. D) somatic nervous system. E) automatic nervous system.

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The product detected in a positive Voges-Proskauer test is:

A. Creatine B. 2,3-butanediol C. Indole D. Acetoin

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When a T cell's CD95L binds to the CD95 on a target cell, antibodies are formed

Indicate whether the statement is true or false

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"Hammerheads" are self-cleaving structures found in

a. mitochondria. b. viroids. c. retroviruses. d. eubacteria. e. archaea.

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