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 characteristics of the phylum Cnidaria |