Biology 11 Chapter - 9
Diversity Among Animals - 39
1.
How many aortic arches are present in chondrichthyes?
a) 1 to 2 pairs
b) 3 to 5 pairs
c) 5 to 10 pairs
d) 5 to 7 pairs
2.
Respiratory organs in chondrichthyes are?
a) Lungs
b) Spiracles
c) Gills
d) Aorta
3.
Which one of the following is not the property of chondrichthyes?
a) Operculum is absent
b) Operculum is present
c) 5 to 7 pairs of gills
d) Swim bladder is absent
4.
Which one of the following is true about chondrichthyes?
a) External fertilization
b) United sexes
c) Internal fertilization
d) Unpaired gonads
5.
Chondrichthyes are?
a) Viviparous
b) Ovoviviparous
c) Oviparous
d) B and c are correct
6.
Which one of the following is a bottom dwelling fish?
a) Skates
b) Rays
c) Both of these
d) Non of these
7.
Which vitamin is present in the oil obtained from shark liver?
a) D
b) C
c) B and c are correct
d) A
8.
Squalus acanthias is commonly called as?
a) Hagfish
b) Eagle ray
c) Dogfish shark
d) Raja
9.
The scales of bony fishes are?
a) All of these
b) Cycloid
c) Ctenoid
d) Ganoid
10.
Bony fishes belong to the class?
a) Chondrichthyes
b) Mixini
c) Cephalospidomorphi
d) Osteichthyes
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