Coral reefs form when the calcite skeletons of coral build upon each other.

What happens when a magniseum ion ia atracked to a chlrene ion

Long term exposure to waves can cause sunburns and skin cancer.

Cattle with brown fur and cattle with white fur will produce a reddish roan calf . when examined closely, the calf show about an even number of brown hairs and white hairs that give a reddish appearance when viewed from far away. the fact that both the brown fur allele and the white fur allele are expressed equally in the offspring is an example of