1. Select incorrect matching:
a) Locusta – Locust
b) Cucumaria – Sea cucumber
c) Meandrina – Sea anemone
d) Echinus – Sea urchin
Explanation: Meandrina – Sea anemone
2. Some cnidarians examples corals have a skeleton composed of
a) Spongin fibres
b) Silica
c) Calcium carbonate
d) Any of these
Explanation: Calcium carbonate
3. Metagenesis is shown by
a) Hydra
b) Adamsia
c) Aurelia
d) Obelia
Explanation: Metagenesis is shown by Obelia.
4. Which of the following is not true fish?
a) Exocoetus
b) Betta
c) Saw fish
d) Jelly fish
Explanation: Jelly fish
5. The umbrella shape and free swimming form of coelenterate reproduced by sexual reproduction
is
a) Polyp
b) Medusa
c) Both (a) and (b)
d) None of these
Explanation: Medusa
6. Sessile, cylindrical form of coelenterate reproduced by asexual reproduction is
a) Polyp
b) Medusa
c) Both (a) and (b)
d) None of these
Explanation: Sessile, cylindrical form of coelenterate reproduced by asexual reproduction is Polyp.
7. Polyp → Asexually → Medusa → Sexually → Polyp
The above cycle is shown by
a) Physalia
b) Aurelia
c) Obelia
d) Hydra
Explanation: Obelia
8. Select from the following total number of organisms which contain the word ‘sea’ in their
common names.
Physalia, Adamsia, Pennatula, Gorgonia, Meandrina, Hydra, Aurelia, Obelia
a) 2
b) 3
c) 4
d) 5
Explanation: 4
9. Which of the following is known as Portuguese man-of-war?
a) gorgonia
b) aurelia
c) physalia
d) obelia
Explanation: physalia
10. The phylum in which first time nerve net arises
a) Porifera
b) Coelenterate
c) Platyhelminthes
d) Protozoa
Explanation: Coelenterate