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
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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
Generally, exotoxins tend to be more heat stable than endotoxins.
Answer the following statement true (T) or false (F)
Which of the following can be used by humans as an energy source?
a. chitin b. amino acids c. cellulose d. RNA
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.