A vector is an organism that ________
A) a host species vulnerable to infection
B) carries a parasite but is never affected by it
C) preys upon vulnerable species
D) is beneficial to parasitized organisms
E) is always parasitic
Answer: B
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The doughnut-shaped wall of intense convective activity surrounding the center of the storm is called the:
A) eye ring. B) eye wall. C) eye. D) core.
How would we use isotopic ages to infer the ages of the upper and lower unit in this diagram?
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