The rise in herd immunity amongst a population can be directly attributed to

A) increased use of antibiotics.
B) improved handwashing.
C) vaccinations.
D) antibiotic-resistant microorganisms.
E) None of the answers is correct.


C

Biology & Microbiology

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Limiting factors to population growth ____

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When a human embryo is implanted in the uterus, the embryo is in the morula stage. Indicate whether the statement is true or false

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