Aerobic processes require __________.
Fill in the blank(s) with the appropriate word(s).
Ans: Oxygen.
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You are a physician, and you suspect your patient has a viral infection that has never been seen in humans. The infection is localized in the cells along the lining of the small intestine
The cells in this area are regularly sloughed off and replaced with new cells; that is, these cells are constantly dividing. When you isolate this new virus and incubate it in culture, you discover that it does not replicate well in cultures that have slowly dividing cells, but it does much more damage in cultures that have actively dividing cells. What do these findings suggest about this new virus? A) It is a double-stranded RNA virus. B) It is a negative-sense, single-stranded RNA virus. C) It is a double-stranded DNA virus. D) It is a single-stranded DNA virus.
Because most herbivores do not produce cellulase, they have specialized compartments in their digestive tracts that (select all correct choices):
A. provide appropriate temperature and pH for breaking down plant material. B. house large populations of bacteria and other single-celled symbionts that do produce cellulase. C. grind up the plant material using muscular gizzards or other structures. D. secrete alternative enzymes that carry out the same function as cellulase. E. ferment nutrients in the hindgut.
Four of the five answers listed below are related by the same gender. Select the exception
a. megaspore b. integuments c. embryo sac d. microspore e. egg
Which animal has a closed circulatory system?
a. clam b. dog c. spider d. snail e. insect