Give salient features of Phylum Echinodermata......
Answers
Answer:
Phylum: Echinodermata
Echinus - Spines, dermaskin
e.g. Asterias (Sea star), Cucumaria (Sea
cucumber), Echinus (Sea urchin). Antedon (sea
lily). Ophiothrix (Brittle star).
These are exclusively marine, solitary,
sedentary or free-living and gregarious,
gregarious,benthic.
These are radially symmetrical
animals with pentamerous symmetry. Body
may be spherical, elongated or star-shaped.
Endoskeleton is made up of calcareous ossicles.
Spines are present on the body, hence the name
echinodermata. The body is without definite
body divisions, instead, there are two sides as
oral and aboral
Answer:
General characteristics of Phylum Echinodermata
(Echinos: Spines; derma: Skin)
Kingdom: Animalia.
Habitat: These are exclusively marine.
Grade of organization: organ system grade.
Germ layer: triploblastic.
Symmetry: Adults are radially symmetrical while the larvae are bilaterally symmetrical.
Coelom: present ( coelomate)
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