When an infectious disease cannot spread in a population because it lacks a significant number of susceptible hosts, the phenomenon is referred to as

A. protected population.
B. active immunity.
C. passive immunity.
D. herd immunity.


D

Biology & Microbiology

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The ABO blood types have __________ different

genotypes. a. 4 b. 6 c. 8 d. 12 e. 16

Biology & Microbiology

EcoRI is an example of a ________.

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

Biology & Microbiology

nonpolar covalent bond

What will be an ideal response?

Biology & Microbiology

Mating in spiders is, in many cases, accompanied by predation of females on their mating partners

The males in turn have evolved behavioral and morphological countermeasures to avoid being preyed upon. Would you calculate fitness costs for the players in these systems in a similar manner as you would when examining interspecific predator–prey interactions? What will be an ideal response?

Biology & Microbiology