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Questions on morphology of frog.

Dear Student
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Questions on Morphology of Frog
1. Why the skin of frog is moist and slippery?
2. Which membrane covers the eyes of frog?
3. What is the function of webbed digits in frog?
4. Where are copulatory pads present in frogs?
5. Name all the parts of alimentary canal in sequential order.
6. Which organ produces bile in frogs?
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what does morphology means.
 
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The body is bilaterally symmetrical and dorsoventrally flattened. Skin is moist, smooth, and slippery. On the dorsal side, there is mid dorsal line running from head to tail. Ventral side is pale ?yellow in colour and dorsal side is dark green with dark patch. Body is divided into head and trunk. In each eye, there are two eyelids. Upper eyelid ids immovable and eyelid is movable. There is third eyelid arising from lower eyelid, which is thin and transparent called nictitating membrane. It is freely movable and protects eye from dirty water. male frog have vocal sac on either side of throat which produces croaking sound to attract female in breeding season.
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