Increase in irritability , ie change in mood and an inability to regulate behaviour
I believe (not sure) that the answer is B, viruses must invade their host before being able to reproduce.
I remember seeing a diagram of the general life of a virus, and I remember seeing the virus sticking to a cell, merging in, and reproducing thereafter (sort of like a factory). Once again, I am not sure and the answer may as well be another one.
Answer:
There is no oxygen in space
Explanation:
space is a vacuum where there is no oxygen.
Answer:
to be honest I don't really know the answer but i would go with D because of cell respiration makes sense to me
Explanation:
