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Question
Write four distinguishing characters of phylum- Echinodermata.
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Solution
- Calcareous spines are present on the bodies of these animals; hence, they are called echinoderms.
- These animals are found only in the ocean.
- Their body is triploblastic, eucoelomate. And it is radially symmetrical in the adult stage. However, they show bilateral symmetry in the larval stage.
- They perform locomotion with the help of tube-feet. Tube feet are also useful for capturing prey. Some animals are sedentary.
- They have a skeleton made up of calcareous spines and/or ossicles (plates).
- These animals have a good ability to regenerate.
- These animals are mostly unisexual.
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