Which characteristic is true for Obelia?
1. Metagenesis
2. Morphogenesis
3. Apolysis
4. Pedogeny
Which of the following animals have scattered cells with cell–tissue grade organization:
1. Sponge
2. Hydra
3. Liver fluke
4. Ascaris
In Hydra, waste material of food digestion and nitrogenous waste material are removed from:
1. Mouth and mouth
2. Body wall and body wall
3. Mouth and body wall
4. Mouth and tentacles
In which animal nerve cell is present but the brain is absent:
1. Sponge
2. Earthworm
3. Cockroach
4. Hydra