* What is a coral skeletal structure that has voids between the polyps?

a.) organic structure

b.) perforated structure

c.) exhaustive structure

A

Explanation:

Each polyp makes its own cup-shaped skeleton called a calyx ("KAY-lix)" from limestone (calcium carbonate). The base of the calyx is called the basal plate, and the outer walls of the calyx are called the theca ("THEE-kuh")

I'm pretty sure it's A

Explanation:

coral skeletons are biocomposites (mineral+organics) or calcium carbonate

the element that provides strength to the exoskeletons of clams and oysters is phosphorus. this is so because calcium carbonate is the main component in the shells.

explanation:

b. heterotroph

explanation: