Home
Class 12
BIOLOGY
[A] : Usually the cells of animals and p...

[A] : Usually the cells of animals and plants have controlled growth .
[R] : In certain special circumstances the cells begin to grow and multiply continuously , forming tumors.

A

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

B

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

C

(c) If A is true and R is false

D

(d) If both A and R are false

Text Solution

Verified by Experts

Promotional Banner

Topper's Solved these Questions

  • KINGDOM PROTISTA (UNICELLULAR EUKARYOTES)

    TRUEMEN BIOLOGY ENGLISH|Exercise MULTIPLE CHOICE QUESTIONS|185 Videos

  • MICROBES IN HUMAN WELFARE

    TRUEMEN BIOLOGY ENGLISH|Exercise Multiple choice question|142 Videos

Similar Questions

Explore conceptually related problems

Plant cells differ from animal cells in having

An animal cell differs from plant cells in not having

Plant cells differ from animal cells in having :

Both animal and plant cells have a well defined cell wall. A. True B. False

Animal cells have more mitochondria than plant cells because

Cells of many protistans, plants, and fungi, but not animals, commonly have :

Mention if the following statements are true or false, In unicellular plants, there is overall growth and not confined to any specific region but in multicellular plants, growth is restricted to specific regions having meristematic cells.

read the following statements w.r.t. growth in living organisms. (a).In plants growth by cell division occurs continuously throughout their lifespan. (b) growth is a defining property of living organism. (c) cell division occurs in certain tissues to replace lost cells. (d) increase in body mass is considered as growth. (e) in majority of higher animals and plants and in unicellular organisms, growth and reproduction are mutually exclusive events. select the correct option.

Which of the following is correct: (a) Cells of all living organisms have a nucleus. (b) Both animal and plant cells have a well defined cell wall. (c) In prokaryotes, there are no membrane bound organelles. (d) Cells are formed de novo from abiotic materials.

State true(T) or false(F) to the given statements and select the correct option. ( a ) Annual rings are distinct in plants growing in temperate regions. ( b ) Lenticels occur in most woody trees and permit the exchange of gases. ( c ) Due to stelar secondary growth, central cylinder of wood surrounded by secondary phloem is formed. ( d ) The cells of endodermis opposite to protoxylem divide to give rise vascular cambium in dicot roots.

TRUEMEN BIOLOGY ENGLISH-Living World -ASSERTION AND REASON
  1. [A] : Nucleus controls metabolic as well as hereditary activities of t...

    Text Solution

    |

  2. [A] : Homeostasis is the maintenance of a stable internal environment ...

    Text Solution

    |

  3. [A] : Usually the cells of animals and plants have controlled growth ....

    Text Solution

    |

  4. [A] : Behavioural activities that are correlated with a one week cycle...

    Text Solution

    |

  5. [A] : Prokaryotic cell shows no cyclosis. [R] : Eukaryotic cell show...

    Text Solution

    |

  6. [A] : No energy can be released in the cell in the absence of mitochon...

    Text Solution

    |

  7. [A] : The lymphocytes have well developed lysosomes . [R] : Because ...

    Text Solution

    |

  8. [A] : Prokaryotes lack Mitochondria. [R] : Their plasma membrane bea...

    Text Solution

    |

  9. [A] : Nuclear membrane of karyotheca forms an envelope-like structure ...

    Text Solution

    |

  10. [A] : The space between nuclear envelope and nucleolus is filled by ka...

    Text Solution

    |

  11. [A] : Leucocytes can digest any thing harmful they eat . [R] : Leuco...

    Text Solution

    |

  12. [A] : The nuclear membrane forms envelope like structure called nuclea...

    Text Solution

    |

  13. [A] : The nuclear envelope is the derivative of membrane of mitochondr...

    Text Solution

    |

  14. [A] : Rods and cones of retina are modified cilia . [R] : Cilia are ...

    Text Solution

    |

  15. [A] : Golgi bodies and dictyosomes are synonymous . [R] : In plants ...

    Text Solution

    |

  16. [A] : Mitochondria have evolved from bacteria . [R] : Mitochondria a...

    Text Solution

    |

  17. [A] : Calcium carbonate crystals are called cystoliths . [R] : The m...

    Text Solution

    |

  18. [A] : F(0) - F(1) - ATPase complex is embedded in inner membrane of mi...

    Text Solution

    |

  19. [A] : Centromere is concerned with splitting of chromosomes . [R] : ...

    Text Solution

    |

  20. [A] : Peroxisomes and basal bodies are called microbodies . [R] : Mi...

    Text Solution

    |