Smallpox was eliminated as a disease because of inoculations and the fact that

A. the alternate host was eradicated.
B. the variola virus mutates infrequently.
C. humans are the only known hosts.
D. the variola virus causes rapid death.


Answer: C

Biology & Microbiology

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The interior of a ____________________ is saltier than its freshwater habitat, so water tends to diffuse into the cell. It uses contractile vacuoles to remove excess water

Fill in the blank(s) with correct word

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The solvent, cohesive, and temperature stabilization

properties of water are due to its a. ability to promote hydrophilic interactions. b. ionic bonds. c. hydrogen bonds. d. ability to promote hydrophobic interactions. e. nonpolar nature.

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In the cell cycle, DNA is replicated during the G2 phase

__________________ Indicate whether the statement is true or false.

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Asexual reproduction can involve all of the following processes except:a

splitting. b. budding. c. fertilization. d. fragmentation. e. parthenogenesis.

Biology & Microbiology