Consider the following characteristics of Porifers:

1. Collared cells called as choanocytes

2. Canal system with pores (ostia) in body wall

3. Mineral spicules

4. High cellular mobility and totipotency

Which of these can be regarded as synapomorphies of Porifera?

In case of poriferans, the spongocoel is lined with flagellated cells called

1. ostia

2. oscula

3. choanocytes

4. mesenchymal cells

Which one of the following statements about all the four of Spongilla, leech, dolphin and penguin is correct?

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

Pick the odd pair out.

(1) Porifera : choanoflagellates

(2) Cnidaria : nematocysts

(3) Nematoda : pseudocoelom

(4) Mollusca : torsion

Which of the following have porous body and have Cellular Level of Organization?

(1) Aurelia and Obelia

(2) Adamsia and Euplectella

(3) Leucosolenia and Spongilla

(4) Sycon and Hydra

Gemmule formation is a common mode of asexual reproduction in

(1) Paramecium

(2) Hydra

(3) sponges

(4) yeast

Water transport system or canal system is a characteristic feature of which animal?

1. Spongilla

2. Hydra

3. Asterias

4. Echinus

Fresh water sponge is the common name of

(1) Hydra

(2) Sycon

(3) Spongilla

(4) Euspongia

Collar cells are present in the members of which phyla

1. Echinodermata

2. Coelenterata

3. Ctenophora

4. Porifera