Body having meshwork of cells, internal cavities lined with food filtering flagellated Cells and indirect development is the characteristics of phylum?
1. Coelenterata
2. Porifera
3. Mollusca
4. Protozoa
Which one of the following statements about all the four of Spongilla, leech, dolphin and penguin is correct?
| 1. | Penguin is homoiothermic while the remaining three are poikilothermic |
| 2. | Leech is a freshwater form while others are marine |
| 3. | Songilla has special collared cells called choanocytes, not found in the remaining three |
| 4. | All are bilaterally symmetrical |
From the following statements, select the wrong one:
| 1. | Prawn has two pairs of antennae |
| 2. | Millipedes have two pairs of appendages in each segment of the body |
| 3. | Animals belonging to the phylum Porifera are exclusively marine |
| 4. | Nematocysts are characteristic of the phylum Cnidaria |
Sycon belongs to a group of animals, which are best described as:
| 1. | Unicellular or acellular |
| 2. | Multicellular without any tissue organization |
| 3. | Multicellular with a gastrovascular system |
| 4. | Multicellular having tissue organization, but no body cavity |