Question

1. (10 pt) All echinoderms move by pumping water into their tube feet, and their body is protected by hard plates. What other characteristic is common to all echinoderms? A. They have tentacles. B. Their bodies have radial symmetry. C. Their bodies are made up of a head, thorax, and abdomen. D. They have eyespots.

Answer 1

The answer is a actually

Answer 2

All echinoderms do have some basic characteristics that are peculiar to them including pumping water into their tube feet. Other characteristics common to them from the options include

a. They have tentacles

b. Their bodies have radial symmetry as adults

d. They have eyespots.

Echinoderms are a group of invertebrates that are mainly marine. They have a much more complex system that some other invertebrates including annelids, platyhelminthes etc.

They also possess special characteristics that identify them as this phylum of organisms including having tube feet. They also do not possess brain.

There is also the presence of tiny eyespots and tentacles which may exist in some as spiny skin. When in the larvae stage, they have bilateral symmetry.

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