4 is nucleus because it’s in the middle
I don't to be honest I barely past health with a b+
Explanation:
HIV attacks a specific type of immune system cell in the body. It's known as the CD4 helper cell or T cell. When HIV destroys this cell, it becomes harder for the body to fight off other infections. When HIV is left untreated, even a minor infection such as a cold can be much more severe.
Because human inheritance is significantly more complicated and interconnected, while Mendels peas plants' inheritance pattern is fairly straightforward and is one of the basic form of inheritance study. HOpe that helped!