Home
Class 12
BIOLOGY
Assertion :- In England, before industri...

Assertion :- In England, before industrialisation, it was observed that there were more white-winged moths on trees than dark-winged or melanised moths.
Reason :- White winged moths can survive in non industrialised area.

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

  • EVOLUTION

    MOTION|Exercise Exercise - 3|54 Videos
  • ENVIRONMENTAL ISSUES

    MOTION|Exercise CHECK YOUR CONCEPTS-6|5 Videos
  • EXCRETORY PRODUCTS AND THEIR ELIMINATION

    MOTION|Exercise EXERCISE - 4 AIIMS - Assertion & Reason Questions|29 Videos

Similar Questions

Explore conceptually related problems

Before industrialization it was observed that there were more white winged moths on trees than dark winged moths Why?

In England, before the Industrialisation set in, it was observed that there were more white winged moths on the trees. However after industrialisation, there were more melanised moths in the same area. This is an example of

A. The conditions primitive on earth (before the origin of life) were : low temperature, volcanic storms, reducing atmosphere containing Ch_(4),NH_(3) , etc. B. Cheetah and humans share similarities in the pattern of bones of forelimbs. C. In a collection of moths made in the 1850s i.e., before industrialization set in, it was observed that there were more dark-winged moths on trees than white-winged moths. D. Branching descent and natural selection are the two key concepts of Darwinian theory of evolution. E. The Neanderthal man with a brain size of 1400 cc lived in east and central Asia 25,000-10,000 years ago. Which set of given statements are correct ?

Taking an example of white-winged moths and dark-winged moths of England in per and post industrialised era, explain evolution by natural selection .

Explain the increases in the numbers of melanic(dark winged) moths in the urban areas of post-industrialisation period in England.

A: During industrialisation dark-winged or melanised moths were more abundant. R: They were able to comouflage themselves, hide in the background and survied.

Explain how natural selection operates in natural by taking an example of white winged and dark winged moths of England.

How can evolution by natural selection be explained by melanised moths before and after industrialisation in England ?

"Appearance of melanised moths post-industrialisation in England is a classic example of evolution by natural selection." Explain.

MOTION-EVOLUTION-Exercise - 4
  1. Assertion :-Fossils are always remains of hard parts of life-forms fou...

    Text Solution

    |

  2. Assertion :- Birds and dinosaurs are close relatives to each other. ...

    Text Solution

    |

  3. Assertion :- In England, before industrialisation, it was observed tha...

    Text Solution

    |

  4. Assertion :- In a mixed population those that can better-adapt, surviv...

    Text Solution

    |

  5. Assertion :- Australian marsupials can be taken as an example of adapt...

    Text Solution

    |

  6. Assertion :-Tasmanian wolf and Placental wolf are the good example of ...

    Text Solution

    |

  7. Assertion :- The rate of appearance of new forms is liked to the life ...

    Text Solution

    |

  8. Assertion :- According to Lamarck, evolution of life forms had occured...

    Text Solution

    |

  9. Assertion :- According to Hugo de Vries , it is mutation which causes ...

    Text Solution

    |

  10. Assertion : Due to continental drift, when South America joined North ...

    Text Solution

    |

  11. Assertion :- Big-Bang theory lalks of a singular huge explosion unimag...

    Text Solution

    |

  12. Assertion :- All mammals like whales, bats cheetah and human etc. shar...

    Text Solution

    |

  13. Assertion :- Branching descent and Natural selection are the two key c...

    Text Solution

    |

  14. Assertion :- Analogous structures are a result of convergent evolution...

    Text Solution

    |

  15. Assertion :- The original drifted population in new habitat becomes fo...

    Text Solution

    |

  16. Assertion :- Homologous organs suggest same origin. Reason :- Organs...

    Text Solution

    |

  17. Assertion : Origin of virus like structure is an example of retrogress...

    Text Solution

    |

  18. Assertion:- The aquatic mammals like Dolphins whales etc. do not conta...

    Text Solution

    |

  19. Assertion :- Dog fish and Whale are example of Homology. Reason : An...

    Text Solution

    |

  20. Assertion :-Analogous organs show common ancestory. Reason :-Analogo...

    Text Solution

    |