The volume of air normally breathed in and out of the lungs in a single breath at rest is referred to as the

A. tidal volume.
B. total volume.
C. reserve volume.
D. inspiratory reserve volume.
E. expiratory reserve volume.


A. tidal volume.

Biology & Microbiology

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The tissue that lines internal surfaces of the body is:

a. epithelial b. loose connective c. supportive connective d. fibrous e. adipose

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Mutations may be caused

a. during replication. b. by transposable elements. c. by UV light and X-ray radiations. d. during transcription. e. by all of these

Biology & Microbiology

G and C are present in both DNA and RNA

Indicate whether the statement is true or false

Biology & Microbiology

The total number of different three-base combinations of the four nucleic acid bases is:

a. 12. b. 16. c. 20. d. 64. e. 256.

Biology & Microbiology