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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
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 ______.
Species that possess a very high risk of extinction due to population decline of about 30 - 50 % over past 10 years are categorized as _______.
What are the major factors that are responsible for the loss of biodiversity? What steps are needed to prevent them?
Which of the following is not a cause for loss of biodiversity?
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?
Which of these is NOT amongst the effects of loss of biodiversity?
What does 'Red' indicate in the IUCN Red list (2004)?
What is common to the species shown in figures A and B?
 |
 |
| A | B |
What is common to the species shown in figures A and B?
 |
 |
| A | B |
"Forests provide intangible benefits to us." Explain by taking three different areas, how.
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?
When a species goes extinct in one area, it is often desirable to re-introduce the species from other populations. A major problem with this approach is that ______.
Decline in the population of Indian native fishes due to introduction of Clarias gariepinus in river Yamuna can be catogoriesd as ______.
Mention any two places where the ex-situ conservation is undertaken.
Which of the following regions of the globe exhibits highest species diversity?
Give definitions of Endangered species.
