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:

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

The scientific name of gharial is:

Which of the given option is correct regarding the statements? 

In which of the following haemocyanin pigment is found?

1. Lower invertebrates

2. Echinodermata

3. Insecta

4. Annelida