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.
Answer:in addition are formation of goose pimples and erection of hair muscles so as to trap more air thus insulation
Answer:
Heterotrophs
Explanation:
A heterotroph is an organism that eats other plants or animals for energy and nutrients.
In most cases, one uses tests whose size is equal to the significance level.
i would say by collecting data
