Component of bones and found in cell membranes

Is a component of the mineral complex hydroxyapatite in bone along with calcium. Bones are the major storehouse of this, holding nearly 85 percent of our supply. The remaining of this mineral is found in cells of soft tissues with a little bit in extracellular fluid.

Explanation:

clumped distribution, because you'de have all of the population gathered in a relatively small are.

it's the most common because it provides protection and a mate for reproduction

example: humans, seeweed, cattles, etc.