Answer:
So when the first animals moved onto land, they had to trade their fins for limbs, and their gills for lungs, the better to adapt to their new terrestrial environment
Explanation:
It is like a barrier, or wall. It helps infection and bacteria stay out. It can also help you indicate whether you are getting infection in the inside of your body. if you're skin is inflamed, that is a sign of disease or infection.
I hope this helped you!
Brainliest answer is always appreciated!<span />
Answer:
Medications can be tested on the cancer culture before being injected into the patient.
Explanation:
