Home
Class 11
BIOLOGY
During embryonic development, the establ...

During embryonic development, the establishment of polarity along anterior/posterior, dorsal/ventral or medial/lateral axis is called

A

Organizer phenomena

B

Axis formation

C

Anamormorphosis

D

Pattern formation

Text Solution

Verified by Experts

The correct Answer is:
a
Promotional Banner

Topper's Solved these Questions

  • HUMAN REPRODUCTION

    PRADEEP|Exercise ASSERTION REASON TYPE QUESTIONS|22 Videos

  • HUMAN REPRODUCTION

    PRADEEP|Exercise NOTABLE QUESTION|3 Videos

  • HUMAN REPRODUCTION

    PRADEEP|Exercise ANALYTICAL QUESTIONS WITH ANSWERS|19 Videos

  • EXCRETORY PRODUCTS AND THEIR ELIMINATION

    PRADEEP|Exercise Curiosity Questions|7 Videos

  • LOCOMOTION AND MOVEMENTS

    PRADEEP|Exercise NOTABLE QUESTIONS|2 Videos

Similar Questions

Explore conceptually related problems

Estalishment of polarity (anterior/posterior,dersal/ventral, medial/lateral) is called

During embryonic development if mouth is formed first and anus is formed later, the condition is called

During development of embryo in archeogonium of Bryophyta its posterior part form protective embryo cover which is called

In exoskeleton of arthropods , I. chitinous plates present over the body are called sclerites . II.sclerites are joined with the help of soft membranous structure called arthrodial membrane . III.the dorsal sclerites are called tergum , ventral sclerites as sternum and lateral sclerites are called pleura. IV. epidermis is present above the cuticle , called hypodermis.

Assertion:The placentation in which the placenta forms a ridge along the ventral suture of ovary and ovules are borne on this ridge forming two rows is called parietal placentation. Reason:The marginal placentation has ovules developed on the inner wall of the ovary or on peripheral part.

A: In cockroach, each segment is covered by three hardened plates called sclerites. R: These sclerites are dorsal tergite, ventral sternite and lateral pleurite.

The A leaves the eye and the retinal blood vessels enter it at a point medial to and slightly above the posterior pole of the eyeball. B is not present in that region and hence it is called the C . At the posterior pole of the eye lateral to the C there is a yellowish pigmented spot called D with a central pit called the E

In the external aperture , of body of Hirudinaria granulosa I.mouth is triradiate aperture , opens into preoral chamber of anterior sucker . II.posterior sucker is formed by the complete fusion of last seven body segments . III.anus is present in 31st segment , which is mid-dorsal in position . IV.female genital pores are mid-ventral in position between 3rd and 4th annuli of 11th segment .

PRADEEP-HUMAN REPRODUCTION -PRACTICE QUESTIONS (I.MULTIPLE CHOICE QUESTIONS)
  1. The number of chromosomes in a mature gamete gets halved during:

    Text Solution

    |

  2. Frog's testes do not posses

    Text Solution

    |

  3. During embryonic development, the establishment of polarity along ante...

    Text Solution

    |

  4. The main function of trophectoderm in mammalian embryo is:

    Text Solution

    |

  5. Amniocentesis is a technique used to

    Text Solution

    |

  6. The early stage human embryo distinctly possesses:

    Text Solution

    |

  7. Which one of the following statements with regard to embryonic develop...

    Text Solution

    |

  8. Rule of embryonic development was given by

    Text Solution

    |

  9. In oogamy, fertilization involves

    Text Solution

    |

  10. If mammalian ovum fails to get fertilized which one of the follo...

    Text Solution

    |

  11. Which of the following is immortal?

    Text Solution

    |

  12. Which one of the following events is correctly matched with the time p...

    Text Solution

    |

  13. Grey crescent is the area

    Text Solution

    |

  14. Extra structure that provides nutrition to embryo is

    Text Solution

    |

  15. Sertoli cells ar regulated by the pituitary hormone know as

    Text Solution

    |

  16. Withdrawal of which of the following hormones is the immediate cause o...

    Text Solution

    |

  17. Which secretions are produced by spermatozoa at the time of fertilizat...

    Text Solution

    |

  18. Which of the following represents a condition where the motility of th...

    Text Solution

    |

  19. Embryo at 16-celled stage is called

    Text Solution

    |

  20. In the human female, menstruation can be deferred by the administratio...

    Text Solution

    |