Home
Class 12
BIOLOGY
A : Blastocyst undergoes gastrulation t...

A : Blastocyst undergoes gastrulation to produce the three germinal layers .
R : This involves cell movements ( morphogenetic movement ) that eventually help to attain new shape and morphology of embryo

A

If both Assertion & Reason are true and the reason is the correct explanation of the assertion then mark (1)

B

If both Assertion & Reason are true but the reason is not the correct explanation of the assertion then mark (2)

C

If Assertion is true statement but Reason is false then mark (3)

D

If both Assertion and Reason are false statement then Mark (4)

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • HUMAN REPRODUCTION

    AAKASH INSTITUTE ENGLISH|Exercise Try Yourself|19 Videos

  • HUMAN REPRODUCTION

    AAKASH INSTITUTE ENGLISH|Exercise Assignment ( Section - C ) (Previous Type Question )|84 Videos

  • EXCRETORY PRODUCTS AND THEIR ELIMINATION

    AAKASH INSTITUTE ENGLISH|Exercise SECTION D ( ASSERTIN-REASON TYPE QUASTION)|10 Videos

  • LOCOMOTION AND MOVEMENT

    AAKASH INSTITUTE ENGLISH|Exercise ASSIGNMENT SECTION-D|10 Videos
AAKASH INSTITUTE ENGLISH-HUMAN REPRODUCTION-Assignment ( Section - D ) (Assertion - Reason Type Question ) (In the following question a statement of assertion (A) is followed by a statement of reason (R )
  1. A : placenta is connected to the embryo through an umbilical cor...

    Text Solution

    |

  2. A : All copulations do not lead to fertilisation and pregnancy ....

    Text Solution

    |

  3. A : Lack of menstruation may be indicative of pregnancy R : ...

    Text Solution

    |

  4. A : LH acts on Sertolic cells for release of certain factors re...

    Text Solution

    |

  5. A : The first sign of growing foetus may be noticed by listeni...

    Text Solution

    |

  6. A: Leyding 's cells synthesise and secrete festicular hormones ca...

    Text Solution

    |

  7. A : In spermatogenesis the first haploid forms are spermatids. R...

    Text Solution

    |

  8. A : Presence or absence of hymen is not a reliable inducator of v...

    Text Solution

    |

  9. A : After menopause the levels of blood gonadotropins will rise ...

    Text Solution

    |

  10. A : The secretions of male accessory glands constitute the semi...

    Text Solution

    |

  11. A : Corpus luteum begins to atrophy after a short life of 10 to ...

    Text Solution

    |

  12. A : Most birds posses only the left ovary and left oviduct for...

    Text Solution

    |

  13. A : The most immediate effect of FSH is the maturation of exis...

    Text Solution

    |

  14. A : The morula passes through the phase of compaction produces ...

    Text Solution

    |

  15. A : Developments is the emergence of a multicellular organism f...

    Text Solution

    |

  16. A : Synthesis of milk is stimulated by rise in the level of ox...

    Text Solution

    |

  17. A : Blastocyst undergoes gastrulation to produce the three germinal...

    Text Solution

    |

  18. A : The scrotum acts as temperature regulator for the testes ...

    Text Solution

    |

  19. A : Fertilin protein is present in the egg membrane R : it help...

    Text Solution

    |

  20. Name two Birth control methods.

    Text Solution

    |