Home
Class 12
BIOLOGY
Assertion :- A sigmoid curve is characte...

Assertion :- A sigmoid curve is characteristic of plants growing in natural environment.
Reason:- In natural conditions generally food and space start to act as limiting factor

A

If both assertion and reason are true and reason is the correct explanation of assertion.

B

If both assertion and reason are true but reason is not the correct explanation of assertion.

C

If assertion is true but reason is false.

D

If both assertion and reason are false.

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • PLANT GROWTH AND DEVELOPMENT

    MOTION|Exercise Exercise - 3|28 Videos

  • PHOTOSYNTHESIS IN HIGHER PLANTS

    MOTION|Exercise Exercise - 4 (ASSERTION & REASON QUESTIONS)|33 Videos

  • PLANT KINGDOM

    MOTION|Exercise Check your concepts -1|16 Videos

Similar Questions

Explore conceptually related problems

Major major limiting factor for the rate of photosynthesis under the natural environmental conditions is

Assertion: Cockroaches and crows are omnivores. Reason: The natural interconnections of food chains make it a food web.

Assertion :- Hormones are said to be similar to enzyme in action and chemical nature. Reason:- Hormones and enzymes are proteinaceous in nature and act as informational nature.

Assertion. Life history of Funaria is completed only when it is growing in humid conditions. Reason. The plant body is very delicate and cannot withstand dry condition.

Assertion : Kinetin is found naturally in plants. Reason : Cytokinin breaks seed and bud dormancy.

Assertion : Heterophylly is seen in many aquatic plants reason : Aquatic plants survive in two different conditions of the environment.

Assertion : Sponges do not show any animal nature. Reason : Sponges are sessile with no apparent way of capturing food or eliminating water

Assertion : The characteristics of cathode rays do not depend upon the material of electrodes and the nature of the gas present in the cathode ray tube. Reason : Cathode rays consist of negatively charged particles, called electrons.

Assertion :- Except sciophyte and plants of dense forest, light is rarely a limiting factor in nature. Reason :- Light saturation occurs at 10 percent of full summer sunlight.

MOTION-PLANT GROWTH AND DEVELOPMENT-Exercise - 4
  1. Assertion :- Plants show open form of growth. Reason:- Plants retai...

    Text Solution

    |

  2. Assertion :- During arithmetic growth there is growth at constant rate...

    Text Solution

    |

  3. Assertion :- A sigmoid curve is characteristic of plants growing in na...

    Text Solution

    |

  4. Assertion :- Plant growth and development is intimately linked with th...

    Text Solution

    |

  5. Assertion :- Environmental signals such as light and gravity also affe...

    Text Solution

    |

  6. Assertion :- Oxygen is compulsory for growth Reason:- Oxygen is mus...

    Text Solution

    |

  7. Assertion :- The act leading to maturation is known as differentiation...

    Text Solution

    |

  8. Assertion :- Beside growth, differentiation in plants is also open. ...

    Text Solution

    |

  9. Assertion :- Development is a broad and extensive aspect of the life o...

    Text Solution

    |

  10. Assertion :- Buttercup produces two different kind of leaves within th...

    Text Solution

    |

  11. Assertion :- Growth regulators are intrinsic and intercellular factors...

    Text Solution

    |

  12. Assertion :- Auxins help to prevent fruit and leaf drop at early stage...

    Text Solution

    |

  13. Assertion :- 2,4-D is one of the selective weedicide. Reason:- 2,4-...

    Text Solution

    |

  14. Assertion :- GA3 is used to speed up the malting process in brewing in...

    Text Solution

    |

  15. Assertion :- Spraying of gibberellin leads to early seed formation in ...

    Text Solution

    |

  16. Assertion :- Kinetin is synthetic cytokinin. Reason:- Kinetin was o...

    Text Solution

    |

  17. Assertion :- Cytokinins helps in the delay of leaf senescence. Reas...

    Text Solution

    |

  18. Assertion :- Ethylene increases the yield of cucurbits. Reason:- Et...

    Text Solution

    |

  19. Assertion :- ABA is stress hormone. Reason:- ABA causes abscission ...

    Text Solution

    |

  20. Assertion :- In day neutral plants there is no correlation between exp...

    Text Solution

    |