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प्रश्न
In a human female, probability of an ovum to get fertilized by more than one sperm is impossible. Give reason.
कारण सांगा
उत्तर
The sperm alters the zona pellucida during fertilisation and prevents other sperms from entering. This avoids polyspermy and guarantees monospermy, in which only one sperm fertilises the ovum.
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