Which of the following would NOT likely develop as an emerging virus?

A) a virus harmful to humans that changes very slowly over time
B) A virus that is normally harmless to humans undergoes rapid mutations.
C) a virus that begins to infect people in New York City, a popular tourist destination
D) a virus that affects primarily rabbits mutates and infects humans


A

Biology & Microbiology

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An excitatory postsynaptic potential ____

a. is cancelled out by an inhibitory postsynaptic potential b. has a hyperpolarizing effect c. will drive the membrane away from its potential d. is summed with an inhibitory postsynaptic potential at the input zone of a neuron e. works so that only one impulse can be received at a time

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What does a gametophyte produce?

A) Haploid gametes B) Diploid gametes C) Haploid spores D) Diploid spores

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A sudden increase in diversity of many animal phyla was seen in the ____ period

a. cambrian b. permian c. devonian d. ediacaran e. cretaceous

Biology & Microbiology