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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
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.
Which among the following is a TRUE statement?
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?
What is common to the following plants: Nepenthes, Psilotum, Rauwolfia and Aconitum?
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.
How many Biodiversity hotspots have been identified around the world?
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.
Enlist two criteria that are used to identify a region for maximum protection as 'Biodiversity hotspots'.
The species placed in CR category is ______.
What is the sustainable use of resources?
Western Ghats have a large number of plant and animal species that are not found anywhere else. Which of the following terms will you use to notify such species?
Many species like Stellar's Sea cow and passenger pigeon have been driven to the brink of extinction. Which of the following describes this situation?
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?
The sixth extinction in progress currently is different from all previous extinctions on earth as it is ______.
Give definitions of Endangered species.
