a. can have both positive and negative
Answer:
The answer is D, the viruses use the body's cells to make new viruses
Explanation:
For example, see the lysogenic and lytic cycle. The lytic cycle involves the virus taking over metabolic processes of the cell in order to reproduce. Probably skip the lysogenic cycle since it does not kill the cell.
Because the brain develops and gets lots of rest for it to function right during the day
The answer is D because when you get a head injury your most likely to have a concussion from the impact which will cause you to loss consciousness and have blurred vision and dizziness.
C. Because you don't have to just stop eating sugar and fats.