Question

1 Echinodermata shows the following
Character except
Grøegacious behaviour
b) direct development,
external fertilization
d) Radially Symmetrical​

Answer 1

Answer: direct development is not the character of echinoderms

Explanation:

Development of echinoderms includes a free swimming larval stage which exhibits bilateral symmetry. The larva of starfish is bippinaria.

Larva of sea urchin is echinopluteus.

Larva of brittle star is ophiopluteus