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Vertebrata Agnatha Pisces - Questions and Answers

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166. Opening of rectum in Frog is called
A. Coccyx
B. Cloaca
C. Anus
D. None of the above
Explanation:
167. Neoteny is characteristic of
A. Bufo
B. Ichthyophis
C. Ambystoma
D. Rana
Explanation:
168. Placoid scales are found in
A. Cartilaginous fishes
B. Bony fishes
C. Lung fishes
D. None of the above
Explanation:
169. An ectothermal cold blooded animal is
A. Penguin
B. Lemur
C. Owl
D. Frog
Explanation:
170. Three-chambered heart of frog is not as efficient as four chambered human heart because
A. Oxygenated and deoxygenated bloods mix up
B. Ventricle does not pump blood properly
C. It does not hold enough blood
D. Heart muscles are not strong
Explanation:
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