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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
Can you think of a situation where we deliberately want to make a species extinct? How would you justify it?
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.
Suggest two practices giving one example of each, that help protect rare or threatened species.
Dodo bird, stellar sea cow and passenger pigeon are few examples of extinction due to ______.
Enlist any six categories into which a given species is placed once it has been thoroughly evaluated by IUCN.
Species that possess a high risk of extinction with very few surviving members (50) are categorised as ____________ by the IUCN.
Which among the following is/are the type( s) of extinction of species?
Which among the following is an exception to invasive species?
Which one of the following is a natural cause of extinction of flora and fauna?
Which of these is NOT amongst the effects of loss of biodiversity?
What does 'Red' indicate in the IUCN Red list (2004)?
What criteria should one use in categorizing a species as threatened?
Explain the concept of "co-extinction" by taking two examples.
How many Biodiversity hotspots have been identified around the world?
The species placed in CR category is ______.
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.
What is ex-situ conservation?
Mention any two places where the ex-situ conservation is undertaken.
The IUCN Red Data List (2004) in the last 500 years documents the extinction of nearly 784 species including ______.
