Home
Class 12
BIOLOGY
(A) : The cleavage in mammalian ova is s...

(A) : The cleavage in mammalian ova is simple holoblastic.
(R): The eggs of mammal are macrolecithal and telolecithal.

A

If both (A) and (R) are true and (R ) is the correct explanation of (A)

B

If both (A) and (R) are true but (R ) is not the correct explanation of (A)

C

If (A) is true but (R) is true

D

If both (A) and (R) are false.

Text Solution

Verified by Experts

The correct Answer is:
c
Promotional Banner

Topper's Solved these Questions

  • REPRODUCTIVE HEALTH

    GRB PUBLICATION|Exercise Assertion -Reason Type Questions|36 Videos
  • REPRODUCTION IN ORGANISMS

    GRB PUBLICATION|Exercise EXEMPLAR PROBLEMS|33 Videos
  • SEXUAL REPRODUCTION IN FLOWERING PLANTS

    GRB PUBLICATION|Exercise NCERT Corner|23 Videos

Similar Questions

Explore conceptually related problems

Cleavage in mammalian egg ,is

Assertion: Mammalian ova produces hyaluronidase. Reason: The eggs of mammal are microlecithal and telolecithal.

Why is the cleavage in mammals referred as simple holoblastie?

Why is cleavage in mammals referred to as simple holoblastic?

Assertion : Cleavage in human zygote is holoblastic . Reason : Its egg contain enormous quantity of yolk.

Identify the statements as Ttue (T) of False (F) and choose the correct option. I. Chief excretory product in mammals is ammonia. II. Cervical v ertebrae are seven in number in mammals expect is slots. III. True flying nocturnal mammals lke bats belong to Chiroptera. IV. Mammalian eggs are small adn microlectithal.

(A): Fertilization in mammales occurs in uterus. (R) : The embryo get implanted before cleavage divisions.

Assertion:Holoblastic cleavage with almost equal sized blastomeres is a characteristic of placental animals. Reason: Eggs of most mammals, including humans, are of centrolecithal type.

(A) : Mammalian ova produces an emzyme hyaluronidase. (R): This enzyme is required to promote cleavage divisons after fertilization.

GRB PUBLICATION-REPRODUCTIVE HEALTH-Assertion -Reason Type Questions
  1. (A) : All graminaceous flowers are always wing pollinated. (R) : The...

    Text Solution

    |

  2. (A) : Insect visit flowers to collect honey. (R): Attraction of flow...

    Text Solution

    |

  3. (A) : Mammalian ova produces an emzyme hyaluronidase. (R): This enzy...

    Text Solution

    |

  4. (A) : Testes of mammals are present outside abdomnial cavity in scrota...

    Text Solution

    |

  5. (A) : Whales and elephants have abdominal testes. (R) : Being poilil...

    Text Solution

    |

  6. (A) : Leyding cells are found without seminiferous tubules of testes. ...

    Text Solution

    |

  7. (A) : Androgens are sometimes called anabolic steroids (R) : They st...

    Text Solution

    |

  8. (A) : Cowpers glands are present in male mammals. (R) : Their secret...

    Text Solution

    |

  9. (A) : The oocyte of a mammal is enclosed in a perforated membrane call...

    Text Solution

    |

  10. (A): Fertilization in mammales occurs in uterus. (R) : The embryo ge...

    Text Solution

    |

  11. (A) : The clitoris is a small finger-like structure in females. (...

    Text Solution

    |

  12. (A) : If acrosome is removed from a sperm it will fail to penetrate in...

    Text Solution

    |

  13. (A) : Menopause occurs in females at the age of 45-50 years. (R) : A...

    Text Solution

    |

  14. (A) : The cleavage in mammalian ova is simple holoblastic. (R): The ...

    Text Solution

    |

  15. (A) : The process of delivery of the foetus is called parturition. ...

    Text Solution

    |

  16. (A) : Barrier methods of contraceptive are available only for females....

    Text Solution

    |

  17. (A) : Sterilization procedure in the male is called vasectomy. (R) :...

    Text Solution

    |

  18. (A) : IUDs are effective contraceptive devices in females. (R) : The...

    Text Solution

    |

  19. (A) : Govenement of India legalised MTP in the year 1971. (R) : It i...

    Text Solution

    |

  20. (A) : 'Saheli' is the world's first nonsteroidal oral contraceptive pi...

    Text Solution

    |