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PHYLUM – CHORDATA...

PHYLUM – CHORDATA

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Phylum - Ctenophora || Phylum - Platyhelminthes

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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.

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.

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

Find out the odd one: (i) Family, Class, Taxon, Phylum (ii) indica, Ficus, Mangifera, Brassica (iii) Plantae, Chordata, Tracheophyta, Eucalyptus

Explain three important features of Chordata.

Which of the following are categorized under Chordata ?

Connecting link between Echinodermata and Chordata is :