Question

Given diagram represent various stages in life cycle of Obelia.
Missing stages A, B and C respectively are _______________.

• A. Medusa, polyp, larva
• B. polyp, medusa, larva
• C. Medusa, larva, polyp
• D. Polyp, larva, Medusa

Answer 1

The correct option is B polyp, medusa, larva

The life cycle ofObelia begins with polyps that are mainly nutritive in function and they form colonies. The gonangium parts are the reproductive unit in the colony. They reproduce asexually by budding and release free-swimming medusa. The medusa reproduces sexually and develops a freely swimming larva. During the development of the larva, the animal reaches the ocean floor and develops into a mature polyp.

So, the correct answer is 'polyp, medusa, larva'