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प्रश्न
Explain the concept of "co-extinction" by taking two examples.
What is co-extinction? Explain with a suitable example?
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उत्तर
When a species becomes extinct, the plant and animal species associated with it, in an obligatory way, also become extinct, e.g., when a host fish species becomes extinct, its parasites also vanish. This is called co-extinction. Some other examples of co-extinction are, plant-pollinator mutualism where the extinction of one leads to the extinction of the other and monophagous insect that feeds on particular plant species becomes extinct due to extinction of that plant species.
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संबंधित प्रश्न
Dodo bird, stellar sea cow and passenger pigeon are few examples of extinction due to ______.
______ refers to the conservation of endangered species outside their natural habitats.
Species that possess a high risk of extinction with very few surviving members (50) are categorised as ____________ by the IUCN.
What do you understand by ‘exotic species’?
What are the major factors that are responsible for the loss of biodiversity? What steps are needed to prevent them?
The extinction of passenger pigeon was due to ______.
Which of these is NOT amongst the effects of loss of biodiversity?
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 is common to the species shown in figures A and B?
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| A | B |
Discuss one example, based on your day-to-day observations, showing how loss of one species may lead to the extinction of another.
List any two major causes other than anthropogenic causes of the loss of biodiversity.
There was a loss of biodiversity in the ecosystem due to a new construction project in that area. What would be its impact on the ecosystem? State any three.
The species placed in CR category is ______.
Mention any two places where the ex-situ conservation is undertaken.
Which one of the following is a pair of endangered species?
The IUCN Red Data List (2004) in the last 500 years documents the extinction of nearly 784 species including ______.
What are the reasons for loss of biodiversity?
Match List - I with List - IІ.
| List - I | List - II |
| A. The Evil Quartet | I. Cryopreservation |
| B. Ex-situ conservation | ΙI. Alien species invasion |
| C. Lantana camara | III. Causes of biodiversity losses |
| D. Dodo | IV. Extinction |
Choose the option with all correct matches.
Which of the following is NOT one of the four causes grouped as the 'Evil Quartet'?
The Nile perch and African catfish are examples of biodiversity loss caused by:
