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 |
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 |