Homcercal and Diphycercal tail
Heterocercal:
Heterocercal tail has the vertebral column bent upwards in the posterior region so that the caudal fin is divided into a narrow dorsal lobe and ______ _____ ________ _____ _______ _______ _______ ______.
______ ______ _______ __________ ___ ________.
_____ _______ ______ ____ __________ ________.
_______ __________ ____ ________ ______ _____ ________ ____ _________ ___ ______.
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________ ______ ________ ___ __________ _________ ____ _____ _______ ____ ________.
________ ______ _______ _____ __________ ___ __________ ________ ________ __________.
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Name the type of accessory respiratory organ in each of the following fishes:
i) Amphipnous
ii) Anabas
iii) Ophiocephalus
iv) Saccobranchus
v) Clarias
How does the respiratory system of cartilaginous fishes differ from that of bony fishes?
Dental formulae of some mammals are given below. Identify the mammal to which the formula belongs from among the names of mammals.
i) =26 (cat, elephant, cow)
ii) = 42 (elephant, man, dog)
iii) = 32 (elephant, horse, man)
iv) = 28 (cow, dog, cat)
Discuss echolocation in bats.
List any four primitive features of the tuatara.
What is the role of ductus arteriosus in bird’s circulatory system?
Explain migration in fishes