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

The scientific name of gharial is:

1. Naja bungarus

2. Gaviais gangeticus

3. Hemidactylus flavivridis

4. None of the above

Which of the given option is correct regarding the statements? 

1. I wrong, II correct

2. I correct, II wrong

3. Both I and II are wrong

4. Both are correct

In which of the following haemocyanin pigment is found?

1. Lower invertebrates

2. Echinodermata

3. Insecta

4. Annelida