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प्रश्न
What could have triggered mass extinctions of species in the past?
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उत्तर
- Volcanic eruption
- Earthquake
- Extremes of temperatures
- Glaciations
- Continental drift
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संबंधित प्रश्न
What are the major causes of species losses in a geographical region?
Can you think of a situation where we deliberately want to make a species extinct? How would you justify it?
Substantiate with the help of one example that in an ecosystem mutualists
are also one of the major causes of biodiversity loss.
Very short answer type question
What do you understand by the EW category of a living being?
Dodo bird, stellar sea cow and passenger pigeon are few examples of extinction due to ______.
Which among the following is a TRUE statement?
Which among the following is an in situ conservation method for national genetic resources?
What do you understand by ‘exotic species’?
What is common to lantana Eichhomia and African catfish?
What criteria should one use in categorizing a species as threatened?
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 ______.
What is the sustainable use of resources?
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?
Give definitions of Endangered species.
Give definitions of Invasive species.
