English
Karnataka Board PUCPUC Science 2nd PUC Class 12

What are the major causes of species losses in a geographical region?

Advertisements
Advertisements

Question

What are the major causes of species losses in a geographical region?

Short Answer
Advertisements

Solution

The major causes of species losses (also known as ‘The Evil Quartet’) are as follows:

  1. Habitat Loss and Fragmentation: Destruction of natural homes due to human activities (e.g., cutting forests).
  2. Over-exploitation: When human need turns into greed, leading to over-use of resources.
  3. Alien species invasions: Introduction of non-native species that threaten local species.
  4. Co-extinctions: Extinction of a species leading to the extinction of other species dependent on it.
shaalaa.com
  Is there an error in this question or solution?
Chapter 15: Biodiversity and Its Conservation - NCERT EXERCISES WITH ANSWERS [Page 697]

APPEARS IN

Nootan Biology [English] Class 12 ISC
Chapter 15 Biodiversity and Its Conservation
NCERT EXERCISES WITH ANSWERS | Q 5. | Page 697
NCERT Biology [English] Class 12
Chapter 13 Biodiversity and Conservation
EXERCISES | Q 5. | Page 227

Video TutorialsVIEW ALL [1]

RELATED QUESTIONS

Can you think of a situation where we deliberately want to make a species extinct? How would you justify it?


Substantiate with the help of one example that in an ecosystem mutualists 

are also one of the major causes of biodiversity loss. 


Answer the following question:
Substantiate with the help of one example that in an ecosystem mutualists
(i) tend to co-evolve and
(ii) are also one of the major causes of biodiversity loss.


Species that possess a very high risk of extinction due to rapid population decline of about 50 - 70 % over three generations is designated as ______.


Species that possess a very high risk of extinction due to population decline of about 30 - 50 % over past 10 years are categorized as _______.


The Red List of threatened species is published by ______.


Currently, ______ mass extinction is considered to be the progressing at an alarming rate due to the loss of biodiversity.


'The Evil Quartet' is a concept which describes the ______.


Accroding to IUCN Red list, the status of Antilope is ____________.


What do you understand by ‘exotic species’?


What is common to lantana Eichhomia and African catfish?


Which of the following statements is correct?


Which of the following are major causes of species losses in a geographical region?


Of the four major causes for the loss of biodiversity (Alien species invasion, habitat loss and fragmentation, over-exploitation and co-extinctions which according to you is the major cause for the loss of biodiversity? Give reasons in support.


What criteria should one use in categorizing a species as threatened?


Though the conflict between humans and wildlife started with the evolution of man, the intensity of conflict has increased due to the activities of modern man. Justify your answer with suitable examples.


Name any two biodiversity hot spots in India.


"Forests provide intangible benefits to us." Explain by taking three different areas, how.


Consider the following statements:

  • Statement I: Endemism and accelerated habitat loss are characteristics of biodiversity hotspots.
  • Statement II: Gene bank is an in-situ method of biodiversity conservation.

Choose the correct answer from the options given below.


Which one of the following is a pair of endangered species?


Red Data Book is maintained by ______.


Give definitions of Extinct species.


Write any three criteria on which different types of reflexes are based.


What are the reasons for loss of biodiversity?


These are regarded as major causes of biodiversity loss:

  1. Over exploitation
  2. Co-extinction
  3. Mutation
  4. Habitat loss and fragmentation
  5. Migration

Choose the correct option:


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×