Biology 11 Chapter - 9
Diversity Among Animals - 37
1.
Which one of the following fins are paired in chondrichthyes?
a) Pelvic
b) Both of these
c) Pectoral
d) None of these
2.
The caudal fin of the chondrichthyes is?
a) Pseudocercal
b) Isocercal
c) Homocercal
d) Heterocercal
3.
The endoskeleton of chondrichthyes is?
a) Entirely cartilagenous
b) Partialy cartilagenous
c) Partialy bony
d) Entirely bony
4.
The stomach of chondrichthyes is?
a) M shaped
b) V shaped
c) Absent
d) J shaped
5.
The heart of chondrichthyes is ___chambered?
a) Two
b) Five
c) Six
d) Four
6.
How many aortic arches are present in chondrichthyes?
a) 5 to 7 pairs
b) 1 to 2 pairs
c) 5 to 10 pairs
d) 3 to 5 pairs
7.
Which one of the following is not the property of chondrichthyes?
a) 5 to 7 pairs of gills
b) Operculum is present
c) Swim bladder is absent
d) Operculum is absent
8.
Which one of the following is true about chondrichthyes?
a) United sexes
b) Unpaired gonads
c) External fertilization
d) Internal fertilization
9.
Chondrichthyes are?
a) Oviparous
b) B and c are correct
c) Ovoviviparous
d) Viviparous
10.
Respiratory organs in chondrichthyes are?
a) Lungs
b) Gills
c) Aorta
d) Spiracles
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