Homeostasis is maintained by the respiratory system in two ways: gas exchange and regulation of blood pH. Gas exchange is performed by the lungs by eliminating carbon dioxide, a waste product given off by cellular respiration.
Answer:
According to the current fossil record, scientists believe that the life on earth began about 3.5 billion years ago.
A concentration gradient and membrane that allows water to pass, but not the solute, must be present
Sorry if I'm wrong but if I'm correct its pupa
The answer could be positive 24 and 25. And negative 24 and 25 since a negative times a negative equals a positive