The protection against a specific infectious disease that arises when all or nearly all of a population is vaccinated is termed

A) immune preparedness.

B) mandatory vaccination.

C) government-controlled health care.

D) herd immunity.


D) herd immunity.

Biology & Microbiology

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All of the following nucleotide bases are pyrimidines EXCEPT

A. adenine. B. thymine. C. cytosine. D. uracil. E. cytosine and thymine.

Biology & Microbiology

Endosperm tissue of angiosperms has what ploidy level?  

A.  n B.  2n C.  3n D.  4n E.  8n

Biology & Microbiology

Diffusion ________ the entropy of a solution.

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

Biology & Microbiology

The liver performs all of the following functions EXCEPT for ____

a. secreting digestive enzymes into the small intestines b. producing bile c. synthesizing plasma proteins d. storing excess glucose e. storing vitamins and minerals

Biology & Microbiology