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प्रश्न
Discuss one example, based on your day-to-day observations, showing how loss of one species may lead to the extinction of another.
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उत्तर
In case a species (x) becomes extinct, the plant and animal species (M, N, O, Z) associated within an obligatory way also become extinct. For example.
- When a fish species which is a host for a number of parasites becomes extinct the parasite species which are uniquely dependent on the host fish will also become extinct.
- The insects may be polyphagous (feed on more than one plant species) or monophagous (feed on only one particular plant species) in nature. The monophagous insect species are valuable and may become extinct if the plant species upon which it feeds becomes extinct.
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संबंधित प्रश्न
What are the major causes of species losses in a geographical region?
Dodo bird, stellar sea cow and passenger pigeon are few examples of extinction due to ______.
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.
Species that possess a very high risk of extinction due to population decline of about 30 - 50 % over past 10 years are categorized as _______.
Species that possess a high risk of extinction with very few surviving members (50) are categorised as ____________ by the IUCN.
The Red List of threatened species is published by ______.
Which among the following is a TRUE statement?
The extinction of passenger pigeon was due to ______.
Which of the following is/are endangered plant species?
Which of these is NOT amongst the effects of 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.
Name any two biodiversity hot spots in India.
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 ______.
Match the species in Column I with its category in Column II.
| Column I | Column II |
| A. Rare species | I. No species |
| B. Vulnerable species | II. Facing a high risk of extinction |
| C. Endangered species | III. Localised species |
| D. Extinct species | IV. Species under threat |
Choose the correct answer from the options given below.
Which of the following regions of the globe exhibits highest species diversity?
The IUCN Red Data List (2004) in the last 500 years documents the extinction of nearly 784 species including ______.
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.
