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
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Which branch of this phylogenetic tree identifies Eukarya?
a. A b. B c. C d. D e. E
A gene that, when mutated, leads to organisms with structures in abnormal places is termed
A. vestigial. B. dominant. C. homeotic. D. parsimonious. E. homologous.
Limiting factors to population growth ____
a. produce less pronounced effects as a population grows b. tend to increase population growth c. are the same as the biotic potential d. raise the carrying capacity to a higher level e. prevent a population from producing a J-shaped growth curve
When a human embryo is implanted in the uterus, the embryo is in the morula stage. Indicate whether the statement is true or false