The size of the egg chiefly depends upon the

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(B) The correct answer is $(B)$.In vertebrates,the size of the egg varies significantly,starting from as small as $0.07 \ mm$.The size of the egg is p

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Amount of yolk reserves in it

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(B) The correct answer is $(B)$.In vertebrates,the size of the egg varies significantly,starting from as small as $0.07 \ mm$.The size of the egg is primarily determined by the amount of yolk reserves present within it.Animals that require more energy for embryonic development,such as sharks,rays,reptiles,and birds,typically lay eggs with larger dimensions due to a higher yolk content.In contrast,the eggs of mammals are generally minute and contain very little yolk.

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