Answer:
SIV or Simian immunodeficiency virus
Explanation:
It causes a disease in monkeys similar to AIDS and is closely related to HIV-2 of humans.
Answer:
This is because the cell membrane is a partially permeable membrane, hence allowing the smaller molecules to enter it and larger molecules to be out. For example, protein is too large to enter the cell
Explanation:
It would be the endocrine system
