The phylum which was earlier considered as a subphylum under chordata but now placed as a separate phylum, in non-chordates is

Assertion: Hemichordata was earlier considered as subphylum under phylum chordata. But now it is placed as a separate phylum under non-chordata. Reason: Hemichordates have open type of circulatory system and indirect development.

Hemichordata was carlier considered as a subphylum under phylum-Chordata. But now, it is placed as a separte phylum under

Phylum Hemichordata was considered as sub-Phyluym of Chordata. Give reason.

Why is phylum arthropoda considered as most successful phylum?

What are the subphyla included under phylum Chordata?

Give diagnostic characters of phylum chordata.

Give diagnostic characters of phylum chordata.

Give classification of phylum chordata.