The "wheel animals" belong to the phylum

1.	Porifera	2.	Rotifera
3.	Nematoda	4.	Anthozoa

In contrast to annelids, the platyhelminthes show

Metameric segmentation is characteristic of

(1) Mollusca and chordata

(2) Platyhelminthes and arthropoda

(3) Echinodermata and annelida

(4) Annelida and arthropoda

Which of the following class of cnidarians lacks a medusa stage

What type of digestion is seen in Cnidaria?

Canal system is a trait found in

Classification of Porifera is based on

Amongst the psuedocoelomates, the largest phylum is the

(1) Annelida

(2) Platyhelminthes

(3) Nematoda

(4) Rotifera

The larva of Cnidarians is called as

(1) Planula

(2) Cercariae

(3) Polyp

(4) Medusa

Reproductive cells of sponges are formed from