Question

State any five differences between scoliodon (dog fish) and Asterias (star fish) .

Answer 1

Scolidon

1) It belongs to phylum Chordata.
2) It doesn't have any spines covering its body.
3) Excretory system is present.
4) They have fins and muscular tail that helps in locomotion.
5) They have gills for respiration.

Asterias

1) It belongs to phylum Echinodermata.
2) It has spiny covering of its body.
3) Excretory system is absent
4) They have tube feet (podia) for locomotion.
5) Tube feet is also used for exchange of gases.

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