Operculum and an air bladder are present in :
1. Clarias
2. Pristis
3. Trygon
4. Carcohrodon
Which of the following is a fish?
(1) Flying fish
(2) Jelly fish
(3) Devil fish
(4) Star fish
Buoyancy in a bony fish is maintained with the help of
(1) streamlined body
(2) paired fins
(3) swim bladder
(4) all the above
Which of the following animal has a bony endoskeleton?
(1) Exocoetus
(2) Clarias
(3) Pristis
(4) both (1) and (2)
The feature lacking in bony fishes would be:
1. | Operculum | 2. | Swim bladder |
3. | Ammonotelism | 4. | Placoid scales |
Bony endoskeleton is present in
(i) Pristis
(ii) Hippocampus
(iii) Icthyophis
(iv) Myxine
1. | (i), (ii), (iii), (iv) |
2. | (ii), (iii) only |
3. | (ii) only |
4. | (ii), (iii), (iv) only |
Select the correct option in respect of characteristics
of each group :-
Cyclostomes |
Chondrichthyes |
Osteichthyes |
|
(i) |
Marine |
Marine, Fresh water |
Marine |
(ii) |
Sucking mouth |
Ventral mouth |
Terminal mouth |
(iii) |
6-15 Pairs of Gills |
5-7 Pairs of Gills |
4 Pairs of Gills |
(iv) |
Placoid scales |
Cycloid Scales |
Ctenoid/ Ganoid |
1. | (i), (ii) are correct. |
2. | (i), (iii), (iv) are correct. |
3. | (ii), (iii) are correct. |
4. | (ii), (iii), (iv) are correct. |
Air bladder is found in:
1. | Osteichthyes | 2. | Aves |
3. | Cyclostomata | 4. | Chondrichthyes |