Question

Give the special features of phylum Echinodermata. What are the similarities between phylum Echinodermata and phylum chordata.

Answer 1

Special features of Echinodermata are:

1. They are exclusively marine.

2. They exhibit radial symmetry.

3. They have spines on their skins.

4. Presence of Endoskeleton.

Common features between Echinodermata and Chordata are:

1. First cells of both the groups grow in a radial fashion.

2. Indeterminate cleavage which means that if the growing cells break apart, they can still develop into two individuals.

3.Presence of a blastopore. Blastopore is the first cavity formed when a organism is developing. This later converts into anus or the end of tail.