Phylum - Chordata

Which of the following statements are true for the phylum-Chordata? (a) In urochordata notochord extends from head to tail and it is present throughout their life. (b) In vertebrata notochord is present during the embryonic period only. (c) Central nervous system is dorsal and hollow. (d) Chordata is divided into 3 subphyla: Hemichordata,Tunicata and Cephalochordata.

Which of the following statements are true for the phylum-Chordata? (a) In urochordata notochord extends from head to tail and it is present throughout their life. (b) In vertebrata notochord is present during the embryonic period only. (c) Central nervous system is dorsal and hollow. (d) Chordata is divided into 3 subphyla: Hemichordata,Tunicata and Cephalochordata.

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

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

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

In which phylum sea pen belongs? 1. Ctenophora 2. Annelida 3. Chordata 4. Cnidaria

Discussion Class-3 Phylum Mollusca || Echinodermata || Hemichordata || Chordata || Cephalochordata || Pisces || Superclass

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.