23. Reptiles

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1.
Beta-Keratin is found in which among the following in abundance?
2.
Which among the following have a ‘mixed heart’ ,that is the heart in which the oxygenated and the deoxygenated blood is mixed?
3.
Which of the following is a non-poisonous snake?
4.
Snakes, turtle, lizards and crocodiles falls under which category of animals?
5.
Which of the following represent Dinosaurs? (UPSC Prelims 1989)
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