Home
Class 12
BIOLOGY
[A] : Mammals lack mucous glands in thei...

[A] : Mammals lack mucous glands in their skin.
[R] : The epidermis has many layers of cells.

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 and R is false

D

If both A and R are false

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • ANIMAL KINGDOM -NONCHORDATES

    TRUEMAN BIOLOGY|Exercise MCQ|283 Videos

  • APPLICATION OF BIOTECHNOLOGY

    TRUEMAN BIOLOGY|Exercise Multiple Choice Questions|122 Videos

Similar Questions

Explore conceptually related problems

[A] : In old age, the skin gets wrinkled. [R]: Epidermis has a single layer of cells.

[A] : Viruses lack any kind of enzymatic machinery . [R] : They can respire only inside host cell .

Epidermis of Balanoglossus consists of 1. a single layer of cells 2. many layers of cells 3. two layers of cells 4. three layers of cells.

[A] : Viruses are not included in any kingdom of classification . [R] : Viruses are not cells as they lack cytoplasm .

[A] : Mycoplasma are the smallest free living microorganisms . [R] : They are prokaryotic and lack cell wall .

[A] : In Mammals sweat glands are primarily concerned with regulations of body heat. [R]: Sweat glands are absent on lip margins.

[A] : Placenta is a tissue in eutherian mam- mals that has both embryonic and maternal tissue. [R]: In mammals, foetal components of the placenta derive from trophoblast.

[A] : Keratin is one of a group of fibrous in- soluble proteins (scelero proteins) found in ectodermal cells of animals, as in hair, horns and nails. Leather is almost pure keratin. [R]: Cornification is a process occurring in vertebrate epidermis and epidermal struc- tures in which keratin replaces the cytoplasm of a cell.

[A] : Sedimentation which has been going on since the earth was formed is process of forming or accumulating sediment in layers, [R] : Weathering and erosion of rocks produces an accumulation of particles that are similar in size and nature and are called sediment.

TRUEMAN BIOLOGY-Animal Physiology -ASSERTION AND REASON
  1. [A]: Lateral-line organs are important in connection with aquatic mode...

    Text Solution

    |

  2. [A] : Accomodation in the bird's eye is con- trolled by the ciliary ap...

    Text Solution

    |

  3. [A] : Mammals lack mucous glands in their skin. [R] : The epidermis ...

    Text Solution

    |

  4. [A] : In old age, the skin gets wrinkled. [R]: Epidermis has a sin...

    Text Solution

    |

  5. [A] : In Mammals sweat glands are primarily concerned with regulation...

    Text Solution

    |

  6. [A] : [A]: Spermatogenesis occurs in the seminiferous tubules of the t...

    Text Solution

    |

  7. Statement 1 : In a Graafian follicle, the primary cell, the and the f...

    Text Solution

    |

  8. [A] : Amniotic fluid serves as a protective cushion. [R]: It breaks...

    Text Solution

    |

  9. [A]: Entry of sperm brings about a rearrangement of materials of cytop...

    Text Solution

    |

  10. A : in morula stage the cells divide without any increase in siz...

    Text Solution

    |

  11. [A]: Brain does not affect in the absence of glucose. [R]: Glucose ...

    Text Solution

    |

  12. [A]: After operation, menstrual cycle in woman may be stopped. [R]...

    Text Solution

    |

  13. Assertion : In placental mammals the placenta is connected to the e...

    Text Solution

    |

  14. Assertion: Smaller the organism higher is the rate of metabolism per g...

    Text Solution

    |

  15. [A] : Haversian canals are inter connecting canals that run usually lo...

    Text Solution

    |

  16. [A]: Conjunctiva is composed of squamous epithelium and is continuous ...

    Text Solution

    |

  17. [A]: During ovarian cycle follicles are controlled by gonadotropic hor...

    Text Solution

    |

  18. [A] : Hydrostatic pressure in blood forces water and other solutes of...

    Text Solution

    |

  19. [A]: Emboly involves the invagination and involution through bottling ...

    Text Solution

    |

  20. [A]: Each testis is attached to the abdominal wall by a ligament and u...

    Text Solution

    |