Q.

Identify the true statement in relation to Osteichthyes.  

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a

Heart is three chambered.

b

Fertilisation is usually external. 

c

Circulation is of open type.   

d

Development is indirect.

answer is B.

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Detailed Solution

Bony fishes (Osteicthyes) have a two-chambered heart with a closed circulatory system. Fertilisation is external with direct development.

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Identify the true statement in relation to Osteichthyes.