Echinodermata|Protochordata

Phyllum- Porifera|Coelenterata|Ctenophora|Platyhelminthes|Aschehelminthes|Annelida|Arthropoda|Mollusca|Echinodermata|Hemichordata

Chordata || Protochordata

Nematoda || Arthropoda || Annelida || Mollusca || Echinodermata || Chordata

How many from the following phylum has external fertilisation with indirect development ? {Porifera, Ctenophora , Echinodermata, Hemichordata }

Water vascular system is the characteristic of which group of the following: (a) Porifera (b) Ctenophora (c) Echinodermata (d) Chordata

Connecting link between Echinodermata and Chordata is :

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

Echinodermata|Body|Water Canal System|Life Process|Examples|Hemichordata|Body|Life Process|Examples|Chordates

Distinguish between (a) Echanidodermata and chordata on the basic of notochord (b) Pisces and aves on the basic of breathing. (c) Platyhelminathese and Echinodermata on the basic of body cavity or coelom.

Echinodermata contains