First slide

Classification of Animals

Question

Formerly, hemichordates were inappropriately included in Chordata based on the presence of

Easy

A

Ventral heart
B

Enterocoelom
C

Stomochord
D

Post-anal tail

Solution

Formerly, Hemichordata was classified as a sub-phylum under Chordata because stomochord was inappropriately considered homologous to notochord. Now, it is treated as a separate non-chordate phylum.

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