Assertion: During the course of evolutio...

Assertion: During the course of evolution, alimentray canal is first completed in aschelminthes, circulatory system in annelids, and respiratory system in arthropods.
Reason: In echinoderms, degestive system is complete with mouth on upper side and anus on the lower side.

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Assertion: During the course of evolution, alimentray canal is first completed in aschelminthes, circulatory system in annelids, and respiratory system in arthropods. Reason: In echinoderms, degestive system is complete with mouth on upper side and anus on the lower side.

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Assertion: During the course of evolution, alimentray canal is first completed in aschelminthes, circulatory system in annelids, and respiratory system in arthropods.
Reason: In echinoderms, degestive system is complete with mouth on upper side and anus on the lower side.