Question

Which of the following is not one of the three major structures of coral reefs?

a. planulae


b. fringing


c. barrier


d. atoll

Answer 1

A planulae is not one of the three major structures of coral reefs as it is one of the stages in the life cycle of a jellyfish known as the free swimming larvae stage. Coral reef structures are made up of fringing reefs that grow directly from the shore, atoll reefs that grow upward usually in a lagoon, and barrier reefs are separated from the land and shore by open water.

Answer 2

Based on the given options, the structure which is not one of the three major structures of coral reefs is Planulae

A coral reef is an organism made of thin layers of calcium carbonate and they feed on algae inhabiting their tissues

What are living organisms?

They are things that possess live in them. Living organisms include both plants and animals.

They carry out characteristics including:

• Nutrition
• Respiration
• Adaptation
• Growth
• Excretion
• Reproduction
• Death
• Movement
• Irritability

Learn more about living organisms:

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