Which of the following best expresses the concept of natural selection

Where is most of the fresh water on earth found a in the ocean b in glaciers and in ice caps c in rivers d in the soil

When is your breathing likely to speed up? a. when your white blood cells increase b. when your cells need more energy c. when your heart cells need more carbon dioxide d. when your blood cells have too much oxygen

The eyeball is wrapped in adipose tissue within the orbit. what is the function of the adipose tissue?