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Sperm of animal species a cannot fertilise ovum of species b because

Fertilizins of a and b are not compatible
Antifertilizins of a and b are not compatible
Fertilizin of a and antifertilizin of b are not compatibel
Antifertilizin of a and fertilizing of b are not compatibel
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Sperm capacitation involves

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Smooth muscles lining the wall of scrotum are called

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Site of vitellogenesis is

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Site of fertilization in a mammal is

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32-celled stage of human embryo is

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Sertoli cells occur in

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Sertoli cells are found

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Seminal vesicles are located in

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Seminal plasma of human males is rich in

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