Question

Write four features of phylum Echinodermata.

Answer 1

phylum :Echinodermata

(Echinus-spines, derma-skin)

1:these are exclusively marine, solitary, sedentary or free -living and gregarious,

benthic

2:these are radialy symmetrical animals with pentamenous symmetry.

3:body may be spherical, elongated or

star shaped.

4:endoskelton is made up of calcareous

osciculs.

5:spines are present on the body, hence the name echinodermata.

6:circulatory and respiratory system is absent.

e.g.Asterias(sea stars), cucumaria(sea cucumber), Echinus(sea urchin), Antedon(sea lily), Ophiothrix (Brittle star).

agar apko answer Sahi lge to plz mark me as a brainlist .

have a nice day :-)