Question No : 1
Tentacles of Hydra help in
Question No : 2
Coelenteron of Hydra serves the double purpose of
Question No : 3
Among coelenterates medusoid individuals are absent in members of the class
Question No : 4
The flagella of food-absorbing cells in hydra aid in
Question No : 5
Rhopalia are the sense organs in medusa belonging to the class
Question No : 6
The first invertebrates to develop a true nervous system are
Question No : 7
Pueumatophore is present in