Which one of the following has an open circulatory system?
1. Pheretima
2. Periplaneta
3. Hirudinaria
4. Octopus

Which type of cells are absent in sponges?

1. Trophocytes

2. Myocytes

3. Archaeocytes

4. Cnidocytes

Food storage in Leucosolenia occur by:

1. ostia

2. osculum

3. thesocytes

4. spongocoel

The structure present in all adult vertebrates is:

1. Notochord

2. Dorsal tubular nerve cord

3. Pharyngeal gill slits

4. All of the above

Which one of the following is not a vertebrate?

1. Sea cow

2. Sea lion

3. Sea horse

4. Sea hare

The canal system is a characteristic feature of:

1. echinoderms

2. helminths

3. coelenterates

4. sponges

Chondrichthyes is characterised by:

1. placoid scale

2. ventral mouth

3. ctenoid scale and ventral mouth

4. placoid scale and ventral mouth

Secondary body cavity with segmented mesodermal lining is called:

1. haemocoel

2. neurocoele

3. true coelom

4. pseudocoelom

One animal that does not perform locomotion is:

1. Sycon

2. Nereis

3. Sepia

4. Euglena