Clonal anergy is a state of

A) antibody production.
B) high energy.
C) unresponsiveness.
D) high energy and antibody production.


Answer: C

Biology & Microbiology

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________ act as proton pumps and keep the internal proton concentration of lysosomes high.

Fill in the blank(s) with the appropriate word(s).

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________ are the long thin cells of skeletal muscles.

a. Myofibrils b. Bursa c. Sarcomeres d. Fibers e. Tendons.

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Control of the fermentation of foods to produce the desired product commonly involves

A) careful choice of foodstuffs. B) pretreating the food by boiling. C) adding required nutrients for microbial growth. D) use of a starter culture. E) both pretreating the food by boiling and adding required nutrients for microbial growth.

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Predators often feed on weak or sick animals in an ecosystem. The role of the predator is described as its

A. community B. habitat C. niche D. population

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