...require a living host cell to survive.
Option C would be correct. The organ system can plays many parts at one time. Also, it is the only system listed.
Hope this helps!
It is d. If it was adaptation, the organism would have stayed in order to adapt. The species moved in order to not go extinct. It can not be speciation, because a new species was not made. It is stimulus. It experienced too much heat, so it left.
Answer:hello!
Explanation:
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