1. In sponges, the commonly seen larva are
a) Amphiblastula
b) Parenchymula
c) Planula
d) Both (a) and (b)
Explanation: Both (a) and (b)
2. Digestion in sponges is
a) Intracellular
b) Extracellular
c) Both (a) and (b)
d) None of these
Explanation: Digestion in sponges is intracellular.
3. Which of the following is correct about reproduction in sponges ?
a) The mode of asexual reproduction such as gemmule formation, budding and fragmentation.
b) Fertilization is internal
c) Development is indirect
d) All of these
Explanation: All of these
4. Exogenous budding is seen in case of
a) Scypha
b) Euspongia
c) Spongilla
d) Hyalonema
Explanation: Scypha
5. The following characters are related to phylum:
(1) Aquatic, mostly marine
(2) Sessile or free swimming
(3) Radially symmetrical animals
(4) They show polymorphism
a) Porifera
b) Ctenophora
c) Echinodermata
d) Coelenterata
Explanation: Coelenterata
6. Cnidoblast is a characteristic feature of
a) Porifera
b) Coelenterata
c) Ctenophora
d) Arthropoda
Explanation: Coelenterata
7. The first diploblastic animal showing tissue level of organization is
a) Sycon
b) Gorgonia
c) Taenia
d) Locust
Explanation: The first diploblastic animal showing tissue level of organization is Gorgonia.
8. Cnidoblast is used for
a) Anchorage
b) Defense
c) Capture of prey
d) All of these
Explanation: All of these
9. Select the total number of organisms from the following which shows both intra and extra
cellular
digestion.
Physalia, Pleurobrachia, Taenia, Culex, Apis, Neries, Echinus, Salpa, Meandrina, Pennatula,
Doliolum, Catla, Hyla, Adamsia, Gorgonia, Ctenoplana.
a) 6
b) 8
c) 7
d) 10
Explanation: 7
10. Select the correct matching:
a) Petromyzon – Hag fish
b) Echinus – Brittle star
c) Apis – Silkworm
d) Pennatula – Sea pen
Explanation: Pennatula – Sea pen
11. Select incorrect matching:
a) Locusta – Locust
b) Cucumaria – Sea cucumber
c) Meandrina – Sea anemone
d) Echinus – Sea urchin
Explanation: Meandrina – Sea anemone
12. Some cnidarians examples corals have a skeleton composed of
a) Spongin fibres
b) Silica
c) Calcium carbonate
d) Any of these
Explanation: Calcium carbonate
13. Metagenesis is shown by
a) Hydra
b) Adamsia
c) Aurelia
d) Obelia
Explanation: Metagenesis is shown by Obelia.
14. Which of the following is not true fish?
a) Exocoetus
b) Betta
c) Saw fish
d) Jelly fish
Explanation: Jelly fish
15. 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
16. 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.
17. Polyp → Asexually → Medusa → Sexually → Polyp
The above cycle is shown by
a) Physalia
b) Aurelia
c) Obelia
d) Hydra
Explanation: Obelia
18. 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
19. Which of the following is known as Portuguese man-of-war?
a) gorgonia
b) aurelia
c) physalia
d) obelia
Explanation: physalia
20. The phylum in which first time nerve net arises
a) Porifera
b) Coelenterate
c) Platyhelminthes
d) Protozoa
Explanation: Coelenterate