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?
A. An age on the dike would not help us because it is an igneous rock. B. The upper unit would be older than an age determined on pebbles of the dike in that unit. C. The dike is younger than the lower unit but older than the upper unit. D. The lower unit would be younger than an age on the crosscutting dike.
The United States is NOT a good example of a nation state
Indicate whether this statement is true or false