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प्रश्न
Can you think of a situation where we deliberately want to make a species extinct? How would you justify it?
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उत्तर
When alien species are introduced unintentionally or deliberately for whatever purpose, some of them turn invasive and cause the decline or extinction of indigenous species. Invasive weed species like carrot grass, lantana and hyacinth (Eicchornia) have become a threat to the environment and other native species. Similarly, the recent illegal introduction of the African catfish Clarias gariepinus for aquaculture purposes is threatening the indigenous catfishes in our rivers. We have to deliberately extinct these harmful species. Similarly, we aim to make the world polio-free by eradicating various viruses, including the polio virus.
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संबंधित प्रश्न
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.
Enlist any six categories into which a given species is placed once it has been thoroughly evaluated by IUCN.
Species that possess a very high risk of extinction due to rapid population decline of about 50 - 70 % over three generations is designated as ______.
______ refers to the conservation of endangered species outside their natural habitats.
The Red List of threatened species is published by ______.
Which among the following is/are the type( s) of extinction of species?
'The Evil Quartet' is a concept which describes the ______.
Which one of the following is a natural cause of extinction of flora and fauna?
What do you understand by ‘exotic species’?
Match the following columns.
| Column - I | Column - II |
| (i) Dodo | (a) Africa |
| (ii) Ouagga | (b) Russia |
| (iii) Thylacine | (c) Mauritius |
| (iv) Stellar's sea cow | (d) Australia |
Choose the correct match from the following
What is common to lantana Eichhomia and African catfish?
Which of the following statements is correct?
Which among the following forests is known as the "lungs of the planet earth"?
Match the animals given in column I with their location in column II:
| Column I | Column II |
| A. Dodo | i. Africa |
| B. Quagga | ii. Russia |
| C. Thylacine | iii. Mauritius |
| D. Stellar's sea cow | iv. Australia |
Choose the correct match from the following:
What could have triggered mass extinctions of species in the past?
What is common to the species shown in figures A and B?
 |
 |
| A | B |
List any three major causes of loss of biodiversity.
Enlist two criteria that are used to identify a region for maximum protection as 'Biodiversity hotspots'.
Which of the following suits hotspots in ecological terminology?
What is the sustainable use of resources?
Decline in the population of Indian native fishes due to introduction of Clarias gariepinus in river Yamuna can be catogoriesd as ______.
Mention any two places where the ex-situ conservation is undertaken.
Which of the following regions of the globe exhibits highest species diversity?
Which one of the following groups faces maximum threat of extinction?
The sixth extinction in progress currently is different from all previous extinctions on earth as it is ______.
Give definitions of Extinct species.
Name any two factors responsible for the loss of biodiversity in a geographical region.
