Why is it very difficult to fight viral infections?
A) A virus is not alive and therefore impossible to kill.
B) It is hard to destroy a virus without damaging the host.
C) The cell wall of a virus is too thick to penetrate.
D) The RNA and DNA of a virus is too different.
E) A and B
Question 2
How does Aristotle's model of matter explain how a puddle of water disappears to dryness on a sunny day?
A) Aristotle's model explains that water becomes dry when it comes into contact with Earth.
B) Aristotle's model explains that moisture combines with heat to form air.
C) Aristotle's model explains that the sun directs Earth to absorb the puddle of water.
D) Aristotle's model has no explanation of how a puddle of water disappears to dryness on a sunny day.
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