What color are corals when they expel their zooxanthellea? pale translucent pink
clear with a white skeleton
creamy white

Radiometric dating is used to tell the absolute age of materials by studying the decay rate of radioactive isotopes. the decay rates of isotopes are constant and are expressed as .

Compare the shapes of the bones of the human skull with the shapes of the bones of the human leg. how do the shapes differ? why are the shapes important?

What are the three groups of atoms that make up amino acids called