Answer the following statements true (T) or false (F)

1. Temperature influences the solubility of gases in water.
2. All gases are equally soluble in water.
3. Fishes exhibit a method of ventilating their gills termed "tidal ventilation."
4. Mammals fill their lungs using a negative pressure mechanism.
5. The lungs of a bird expand as it inhales and contract as it exhales.


1. TRUE
2. FALSE
3. FALSE
4. TRUE
5. FALSE

Biology & Microbiology

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Which of the following is NOT a characteristic of viruses?

A. they are visible with a light microscope. B. they are acellular. C. they are composed of genetic material and protein. D. they are typically smaller than prokaryotic cells. E. they are obligatory parasites.

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The enzyme ____ repairs breaks in the DNA sugar-phosphate backbone

A. DNA ligase B. DNA polymerase C. AP endonuclease D. uracyl glycosylase E. none of these

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Generally, exotoxins tend to be more heat stable than endotoxins.

Answer the following statement true (T) or false (F)

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Which of the following can be used by humans as an energy source?

a. chitin b. amino acids c. cellulose d. RNA

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