Home
Class 12
BIOLOGY
Taking an example of white-winged moths ...

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

Text Solution

AI Generated Solution

**Step-by-Step Solution:** 1. **Introduction to Natural Selection**: - Natural selection is a process where organisms better adapted to their environment tend to survive and produce more offspring. This concept was famously introduced by Charles Darwin. 2. **Background on Moths**: - In England, there were two types of moths: the white-winged moths and the dark-winged moths. The coloration of these moths plays a crucial role in their survival against predators. ...
Promotional Banner

Topper's Solved these Questions

  • XII BOARDS

    XII BOARD PREVIOUS YEAR PAPER ENGLISH|Exercise SECTION-E|6 Videos
  • XII BOARDS

    XII BOARD PREVIOUS YEAR PAPER ENGLISH|Exercise [OUTSIDE DELHI : SET-II] SECTION -A|2 Videos
  • XII BOARDS

    XII BOARD PREVIOUS YEAR PAPER ENGLISH|Exercise OUTSIDE DELHI SET III|8 Videos
  • SAMPLE PAPER 2019

    XII BOARD PREVIOUS YEAR PAPER ENGLISH|Exercise Section E Part B|3 Videos

Similar Questions

Explore conceptually related problems

a) How do the observations made duirng moth collection in pre- and postindustralized era in England support evolution by Natural Selection? b) Explain the phenomenon that is well represented by Darwin's finches other than natural selection.

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.

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

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

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

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 age. Which set of given statements are correct ?

The evolutionary story of moths in England during industrialisation reveals, that ' evolution is apparently reversible '. Clarify this statement.

Populations of peppered moth Biston betularia of England underwent directional selection during and after industrialisation. The selective agent causing the change was/were

Industrial melanism in peppered moth occurred due to natural selection . The significant reason for this is (a) the light coloured white moths could not be noticed by predatory birds after deposition of soots on bark of trees (b) mutation in light coloured moths due to increase in industrial pollution (c) advantageous selection of black moths on tree in polluted areas, resulting in increase population of black moths (d) advantageous selection of white moths on tree in polluted areas, resulting in increased population of white moths

XII BOARD PREVIOUS YEAR PAPER ENGLISH-XII BOARDS-COMPTT
  1. (a) What is an "allergic reaction"? (b) Name any two drugs used to q...

    Text Solution

    |

  2. Identify a, b, c,d,e and f in the following table :

    Text Solution

    |

  3. List any two types of IUDs that are available for human females and st...

    Text Solution

    |

  4. Mention the rule of (i) selectable marker, (ii) Ori and (iii) rop in E...

    Text Solution

    |

  5. Write the aim with which animal breeding programmes are carried. Descr...

    Text Solution

    |

  6. Draw a diagram of sectional view of human ovary and label (i) Primary ...

    Text Solution

    |

  7. (a) Draw a diagram of Pistil showing pollen tube growth in angiosperm...

    Text Solution

    |

  8. What was the challenge for production of insulin using rDNA techniques...

    Text Solution

    |

  9. Identify A, B, C, D, E and F in the table given below :

    Text Solution

    |

  10. Name the organism from which the 'cry' genes are isolated. Mention wit...

    Text Solution

    |

  11. Excessive and continous use of pesticides has resulted in evolution of...

    Text Solution

    |

  12. Explain with the help of two examples how certain plants have evolved ...

    Text Solution

    |

  13. What type of organs eye of an Octopus and that of a human called? Give...

    Text Solution

    |

  14. With the revolution in information technology, now it has become an in...

    Text Solution

    |

  15. (a) Explain the steps involved in in-vitro fertilisation popularly kno...

    Text Solution

    |

  16. (a) State one difference and one similarity between geitonogamy and ...

    Text Solution

    |

  17. (a) Hershey and Chase carried their experiment in three steps : infect...

    Text Solution

    |

  18. Taking an example of white-winged moths and dark-winged moths of Engla...

    Text Solution

    |

  19. (a) Write the percentage of land area that was covered by forests by t...

    Text Solution

    |

  20. (a) Comment on the pattern in which all communities undergo a change i...

    Text Solution

    |