Home
Class 12
BIOLOGY
[A]: Polyploidy increases the tolerance ...

[A]: Polyploidy increases the tolerance of plants towards extreme climates.
[R]: Autopolyploids produce seed less fruits.

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

  • Fungi

    TRUEMAN BIOLOGY|Exercise ASSERTION AND REASON|27 Videos

  • GENETICS AND EVOLUTION

    TRUEMAN BIOLOGY|Exercise SECTION-A|34 Videos

Similar Questions

Explore conceptually related problems

Photoblastic seed producing plants are

One hormone hastens maturity period in juvenile conifers, a second hormone controls xylem differentiation, while the third hormone increases the tolerance of plants to various stresses. They are respectively :

when a pure strain of tall plants (TT) within round seeds (RR) is crossed with a pure strain of short plants (tt) with wrinkled seeds (rr) , an F, generation is produced . The aelles for short and wrinkled are recessive to thiose for tall and round , respectively. When these F1 plants self pollinate ,what proportion of the F2 generation is short with wrinkled seeds?

plants which posseses seeds but not fruits are

Example of the plant which bears seed but not fruit is

_____produce elongation of stem by increasing the length of internodes in plants.

[A] : Glyoxysome are present only in plant cells . [R] : They are found in yeast , Neurospora and oil rich seeds .

[A] : There is a grudual increase in the energy content at successive trophic level from producer to consumers . [R]:When one organism benefits the other in a chain , it is called commensalism .

Assertion (A) : Presence of a nitro group at ortho-or para- position increases reactivity of haloarenes towards nucleophilic substitution. Reason (R) : Nitro group, being an electron withdrawing group decreases the electron density over the bvenzene ring.

Compare the statements a and b Statement a. To counteract the increase in turgor preassure in plant cells the cell wall produces an equal and opposite pressure, i.e., wall pressure Statement b.When plant cells undergo endosmosis, they swell but do not burst .

TRUEMAN BIOLOGY-Genetics-ASSERTION AND REASON
  1. [A]: If a population is of dominant genotype AA, then the frequency of...

    Text Solution

    |

  2. [A]: In paracentric inversions the centromere is outside the inverted ...

    Text Solution

    |

  3. [A]: Polyploidy increases the tolerance of plants towards extreme clim...

    Text Solution

    |

  4. [A]: Haemophillia is a genetically linked dis- ease. [R]: The carri...

    Text Solution

    |

  5. [A]: Cytoplasmic male sterility is observed in maize. [R]: The cyto...

    Text Solution

    |

  6. Assertion: DNA synthesis occurs in G(1) and G(2) periods of cell cycle...

    Text Solution

    |

  7. [A]: Sickle-cell anaemia is a genetically de- termined disorder affect...

    Text Solution

    |

  8. [A]: The deleted region of long arm of chro- mosome 7 contains the ela...

    Text Solution

    |

  9. [A]: Centromere is the primary constriction on the metaphase chromosom...

    Text Solution

    |

  10. [A]: Dolly, a sheep is an example of cloning. [R]: Cloning in anoth...

    Text Solution

    |

  11. Assertion (A) : Replication and transcription occur in the nucleus but...

    Text Solution

    |

  12. [A]: Cycads were prevalent during Jurassic period. [R]: Jurassic pe...

    Text Solution

    |

  13. [A]: Evolution is descent with modification. [R]: Evolution is der...

    Text Solution

    |

  14. [A]: Isolation is a mechanism which prevents interbreeding among other...

    Text Solution

    |

  15. [A]: Mesozoic era is known as the 'Age of Reptiles'. [R]: It was ...

    Text Solution

    |

  16. [A]: Radioactive carbon ^(14)C method is quite accurate for relativel...

    Text Solution

    |

  17. [A]: According to Hardy-Weinburg law both gene frequencies and genotyp...

    Text Solution

    |

  18. [A]: 'Ontogeny recapitulates phylogeny' was the concept put forward by...

    Text Solution

    |

  19. [A]: Vestigeal organs are those parts of the body which are greatly re...

    Text Solution

    |

  20. [A]: Homology is the similarity between organs of same animal based on...

    Text Solution

    |