Which of the following are true for class Osteichthyes?a. Claspers facilitate internal fertilisation.b. An operculum covers gill-slits on each side.c. An air bladder regulates buoyancy.d. Caudal fin is heterocercal.
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a
b and c
b
a, b and c
c
c and d
d
a and b
answer is A.
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Detailed Solution
Claspers and heterocercal caudal fins are found in Chondrichthyes.
Which of the following are true for class Osteichthyes?a. Claspers facilitate internal fertilisation.b. An operculum covers gill-slits on each side.c. An air bladder regulates buoyancy.d. Caudal fin is heterocercal.