Question

In some cnidarians like corals have a skeleton composed of(a) Silica
(b) spicules(c) Calcium phosphate
(d) Calcium carbonate

Answer 1

Answer:

The correct answer is option (d) Calcium carbonate.

Explanation:

• Corals and other cnidarians have calcium carbonate skeletons.
• Thin calcium carbonate layers make up a coral reef.
• When each individual stony coral polyp secretes a calcium carbonate skeleton, massive reef formations are created.
• Animals that are sessile or free-swimming, aquatic, mainly marine, and radially symmetrical are known as cnidarians.
• Cnidarians are distinguished by the presence of stinging capsules, or nematocytes, which are located on the body and tentacles for anchoring, defence, and prey capture.
• The skeleton of some cnidarians, like corals, is made of $CaCO_{3}$.

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