Home
Class 12
BIOLOGY
Assertion : Tropical regions have got a ...

Assertion : Tropical regions have got a long evolutionary time for species diversification as compared to temperate regions.
Reason : Temperate regions have undergone frequent glaciations in the past whereas tropical regions have remained relatively undisturbed for millions of years.

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

Speciation is a function of time. Temperate regions have undergone frequent glaciations in the past, due to which many species had been killed. However, tropical latitudes have remained relatively undisturbed for millions of years and thus, had a long evolutionary time for species diversification.
Promotional Banner

Topper's Solved these Questions

  • BIOTECHNOLOGY - PRINCIPLES AND PROCESSES

    NCERT FINGERTIPS|Exercise Biotechnology - Principles And Processes|139 Videos

Similar Questions

Explore conceptually related problems

Tropical regions have greater biodiversity as compared to temperate regions due to :-

What is so special about tropics that might account for their greater biological diversity? a. Unlike temperate regions subjected to frequent glaciations in the past, tropical latitudes have remained relatively undisturbed for millions of years and thus, had a long evolutionary time for species diversification. b. Temperate environments, unlike tropical ones, are less seasonal, relatively more constant and predictable. Such constant environments promote niche specialization and lead to a greater species diversity. c. There is more solar energy available in the tropics, which contributes to higher productivity, this in turn might contribute indirectly to greater diversity.

The tropics have more diversity of vascular plants as compared to the temperature regions because of

Assertion : Lichens are a pioneer community in the temperate region. Reason : Blue-green algae grow as the pioneer community in the tropical region.

Which of the following is not a fundamental reason for greater biodiversity in tropics as compared to that of temperate regions ?

Assertion: Tropical regions are more diversity-rich in comparison to temperate areas. Reason: Availability of more solar energy directly affects the presence of more species in these areas.

Assertion (A) Tropical rain forest are rich in species diversity than temperate forest. Reason (R) Frequent glaciations was quite common in temperate region in the part and absent in tropical rain forest

Choose how many of the given statement are not correct about the Tropics ? (i) Greater species diversity compared to Temperate (ii) Subjected to frequent glaciations in the past (iii) Great seasonal variations are seen here (iv) Enviornment is relatively constant

NCERT FINGERTIPS-BIODIVERSITY & CONSERVATION-Biodiversity & Conservation
  1. The active chemical drug reserpine is obtained from

    Text Solution

    |

  2. Which of the following group exhibit more species diversity

    Text Solution

    |

  3. Which of the below mentioned regions exhibit less seasonal variations ...

    Text Solution

    |

  4. The historic convention on Biological Diversity held in Rio de Janeiro...

    Text Solution

    |

  5. What is common to the techniques (i) in vitro fertilisation, (ii) Cryo...

    Text Solution

    |

  6. Assertion : Genetic variation shown by the plant Rauwolfia vomitoria g...

    Text Solution

    |

  7. Assertion : The specific diversity present in a given community or hab...

    Text Solution

    |

  8. Assertion : Tropical regions have got a long evolutionary time for spe...

    Text Solution

    |

  9. Assertion : If the species-area relationship are analysed among very l...

    Text Solution

    |

  10. Assertion : Species with low genetic variability are more vulnerable t...

    Text Solution

    |

  11. Assertion : Threatened species are those living species which have bee...

    Text Solution

    |

  12. Assertion : Critically endangered category includes the species which ...

    Text Solution

    |

  13. Assertion : Over-exploitation of a species reduces the size of its pop...

    Text Solution

    |

  14. Assertion : The Nile perch introduced into lake Victoria in east Afric...

    Text Solution

    |

  15. Assertion : Broadly utilitarian arguments say that we should conserve ...

    Text Solution

    |

  16. Assertion : Biodiversity hotspots are the regions which possess high l...

    Text Solution

    |

  17. Assertion : Jim Corbett National Park is the first National Park of In...

    Text Solution

    |

  18. Assertion : In a wildlife sanctuary, collection of timber, harvesting ...

    Text Solution

    |

  19. Assertion : One of the most important traditional uses of sacred grove...

    Text Solution

    |

  20. Assertion : Offsite collections can be used to restock depleted popula...

    Text Solution

    |