The canal system is a characteristic feature of:

1. echinoderms

2. helminths

3. coelenterates

4. sponges

One animal that does not perform locomotion is:

1. Sycon

2. Nereis

3. Sepia

4. Euglena

Which type of cells are absent in sponges?

1. Trophocytes

2. Myocytes

3. Archaeocytes

4. Cnidocytes

Chondrichthyes is characterised by:

Which one of the following is not a vertebrate?

1. Sea cow

2. Sea lion

3. Sea horse

4. Sea hare

Secondary body cavity with segmented mesodermal lining is called:

The structure present in all adult vertebrates is:

Food storage in Leucosolenia occur by: