Home
Class 12
BIOLOGY
With the change in environmental conditi...

With the change in environmental conditions , some species disappear and some remain . This loss of species which occurred in the geological past at a very slow rate is called :

A

Anthropogenic extinction

B

Mass extinction

C

Natural extinction

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • BASIC CONCEPT OF IMMUNOLOGY

    USHA PUBLICATION|Exercise EXERCISE|141 Videos
  • BIOTECHNOLOGY & ITS APPLICATIONS

    USHA PUBLICATION|Exercise EXERCISE|76 Videos

Similar Questions

Explore conceptually related problems

During ripening of some fniits (e.g. apple, banana), there is sudden increase in sudden increase in respiration rate which is called:

There are four major causes of accelerated rates of species extinction, which are collectively called as 'the evil quartet'. Which one of the following is not included in 'the evil quartet' ? (a) Over exploitation (b) Pollution (c) Co-extinctions (d) Alien species invasions

A car accelerates from rest at constant rate of 2m/s^2 for some time. Then it retards at constant rate of 4m/s^2 and comes to rest . If the total time for which it remains in motion is 3 seconds, what is the distance travelled ?

Read the following statements (i) Birth control pills are likely to cause cardiovascular problems (ii) A women who substitutes or takes the place of the real mother to nurse the embryo is called surrogate mother (iii) Numerous children have been produced by in vitro fertilisation but with some abnormalities (iv) Women plays a key role in the continuity of the family and human species (v) Foetal sex determinatio test should not be banned Which of the following pair consists of incorrect statements

Assertion : Critically endangered category includes the species which have sufficient populationa at present but is undergoing depletion due to some factors. Reason : Vulnerable category includes the species which are facing very high risk of extinction in the wild an can become extinct any moment. (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.

The durations of mitotic stages in two situations. (A and B) are tabulated below. Following are some interpretations: 1. 'A' and 'B' indicate the same plant tissue grown at higher and lower temperature respectively. II. 'A' indicates a slow growing plant species and 'B' indicates a fast growing plant species. III. Both 'A' and 'B' indicate dormant plant tissues with excessively long interphase. The correct interpretations is/are

Correct the statements by changing underlined words only. Extinct species means which are no longer seen in living form and its remains are available in vulnerable form.

Read the following statements with one or two blanks in each one of them. (i) A genus containing more than one species is called ______ genus, e.g., _______ . (ii) _______ is a collection of dried, pressed and preserved plants mounted on _________ sheets, properly labelled, systematically arranged and available for reference study. (iii) Living fossils are ancient organisms persisting in modern times _______ gradual morphological changes. (iv) A ________ is compreshensive treatise of a taxonomic group, generally a genus or a family, providing all taxonomic data related to that group. Which of the following correctly fills any two of the above statements ?

USHA PUBLICATION-BIODIVERSITY & CONSERVATION -ECERCISE
  1. David Tilman's long - term ecosystem experiments using outdoor plots c...

    Text Solution

    |

  2. Which of the following is correct ?

    Text Solution

    |

  3. With the change in environmental conditions , some species disappear a...

    Text Solution

    |

  4. Which of the extinctions are rare :

    Text Solution

    |

  5. Extinctions which occurred due to big natural catastrophes is called :

    Text Solution

    |

  6. Anthropogenic extinction is causing the ' sixth extinction ' . It is ...

    Text Solution

    |

  7. The IUCN . Red list ( 2004 ) documents the extinction of ( A ) species...

    Text Solution

    |

  8. The colonisation of tropic pacific islands by humans have ' resulted i...

    Text Solution

    |

  9. Which of the following has undergone recent extinctions ?

    Text Solution

    |

  10. Following mass extinctions , recovery to the same level of biodiversit...

    Text Solution

    |

  11. Which of the following term includes all of the others ?

    Text Solution

    |

  12. Which of the following groups is most , threatened by global extinctio...

    Text Solution

    |

  13. Which term did Edward Osborne Wilson coin for our innate appreciation ...

    Text Solution

    |

  14. We should care about loss in biodiversity in the populations of other ...

    Text Solution

    |

  15. The most serious consequence of a decrease in global diversity would b...

    Text Solution

    |

  16. The most direct threat to biodiversity is :

    Text Solution

    |

  17. Introduced species can have deleterious effects on biological communit...

    Text Solution

    |

  18. Agricultural lands frequently require nutrient augmentation because :

    Text Solution

    |

  19. IUCN has its headquarters at :

    Text Solution

    |

  20. Which among the following category is most threatened ?

    Text Solution

    |