Q52 of 100 Page 161

Name two animals which undergo metamorphosis and two which do not.

Frog and silk moth undergo metamorphosis whereas cow and hen do not undergo metamorphosis.


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50

Explain how, chicks are born. How much time does the embryo present in hen’s egg take to develop into a chick (when provided sufficient warmth) ?

 51

In which of the following animals the embryo develop fully inside the mother’s body and in which they develop fully in the eggs laid by mother ?

Cow, Ostrich, Frog, Lizard, Deer, Cat, Snake, Tiger, Dog, Hen

 53

Which of the following animals undergo metamorphosis and which do not ?

Cow, Butterfly, Silk moth, Humans, Frog, Housefly, Sparrow, Hen, Mosquito, Money

 54

What are gametes ?