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प्रश्न
What is common to the species shown in figures A and B?
 |
 |
| A | B |
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उत्तर
Both are examples for Keystone species
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संबंधित प्रश्न
What are the major causes of species losses in a geographical region?
Substantiate with the help of one example that in an ecosystem mutualists
are also one of the major causes of biodiversity loss.
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 ______.
Which among the following is/are the type( s) of extinction of species?
Which among the following is a TRUE statement?
Currently, ______ mass extinction is considered to be the progressing at an alarming rate due to the loss of biodiversity.
Which among the following is an exception to invasive species?
Threatened species are those which ______.
What are the major factors that are responsible for the loss of biodiversity? What steps are needed to prevent them?
Which of the following statements is correct?
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.
Which of the following suits hotspots in ecological terminology?
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.
Red Data Book is maintained by ______.
The IUCN Red Data List (2004) in the last 500 years documents the extinction of nearly 784 species including ______.
Give definitions of Endangered species.
Write any three criteria on which different types of reflexes are based.
