Body having meshwork of cells, internal cavities lined with food filtering flagellated cells

and indirect development are the characteristics of phylum

1. Coelenterata

2. Porifera

3. Mollusca

4. Protozoa

Which of the following represent the correct combination without any exception?

Which of the following animals is not viviparous?

1. Flying fox (bat)               

2. Elephant

3. Platypus

4. Whale

Pick the odd pair out.

(1) Porifera : choanoflagellates

(2) Cnidaria : nematocysts

(3) Nematoda : pseudocoelom

(4) Mollusca : torsion

Chitin is a polysaccharide found in the exoskeleton of

(1) prawn

(2) insects

(3) crabs

(4) all of these

Which of these is not a coelenterate?

(1) Sea pen

(2) Sea fur

(3) Sea anemone

(4) Sea lily

Protonephridia are the excretory structures present in

(1) Planaria

(2) roundworm

(3) tapeworm

(4) Both 1 and 3

Carapace is present can be observed in

(1) Hemidactylus

(2) Testudo

(3) Naja

(4) Bufo

Closed circulatory system is not found in

(1) octopus

(2) tunicates

(3) echinoderms

(4) squids

Polyp phase is absent in the life cycle of:

(1) Hydra

(2) Hormiphora

(3) Pennatula

(4) Physalia