Home
Class 12
BIOLOGY
How does zona pelucida of ovum help in p...

How does zona pelucida of ovum help in preventing polyspermy?

Promotional Banner

Topper's Solved these Questions

  • P.S.E.B SAMPLE PAPER-2021(SOLVED)

    JMD PUBLICATION|Exercise EXERCISE|30 Videos
  • Principle of Inheritance & Variations

    JMD PUBLICATION|Exercise EXERCISE|25 Videos

Similar Questions

Explore conceptually related problems

How does the ploughing of fields help in preservation of moisture in the soil?

How does NaCN act as a depressant in preventing ZnS from forming the froth ?

How is ozone layer help to us?

How does Baker's yeast help in production of bread ?

JMD PUBLICATION-PRACTICE SAMPLE PAPER (SOLVED)-EXERCISE
  1. True and False Type Questions Coextinction is very common is parasit...

    Text Solution

    |

  2. Are pollination and fertilisation necessary in apomixis? Give reasons.

    Text Solution

    |

  3. How does zona pelucida of ovum help in preventing polyspermy?

    Text Solution

    |

  4. What is the significance of progesterone -estrogen combination as a co...

    Text Solution

    |

  5. Strict conditions are to be followed in medical termination of pregnan...

    Text Solution

    |

  6. Discuss the genetic basis of wrinkled phonotype of Pea seed.

    Text Solution

    |

  7. In a nucleus, the number of ribonucleoside triphosphate is 10 times th...

    Text Solution

    |

  8. Name any three viruses which have RNA as the genetic material.

    Text Solution

    |

  9. Certain pathogens are tissue /organ specific. Justify the statement wi...

    Text Solution

    |

  10. What is the chemical nature of biogas?Name an organism which is involv...

    Text Solution

    |

  11. While doing a PCR,'denaturation' step is missed. What will be its effe...

    Text Solution

    |

  12. What is GEAC? What are its objectives?

    Text Solution

    |

  13. Define phenotypic adaption.Give one example.

    Text Solution

    |

  14. Give characteristics of biotic community.

    Text Solution

    |

  15. What does 'Red' indicate in the IUCN Red list(2004)?

    Text Solution

    |

  16. Which Mendel's law of inheritance is universally acceptable and withou...

    Text Solution

    |

  17. What is a template strand and coding strand ?

    Text Solution

    |

  18. What are the various routes by which transmission of human immunodefic...

    Text Solution

    |

  19. Microbes play a dual role when used for sewage treatment as they not o...

    Text Solution

    |

  20. Describe briefly Restriction Enzymes and DNA.

    Text Solution

    |