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प्रश्न
What criteria should one use in categorizing a species as threatened?
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उत्तर
The criteria that should be used in categorising a specials as threatened are
- Number of the members of the species is declining at an alarming rate.
- Their habitat is being modified or destroyed.
- Predator or poacher activities are increasing.
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संबंधित प्रश्न
What are the major causes of species losses in a geographical region?
Suggest two practices giving one example of each, that help protect rare or threatened species.
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 ______.
With the help of any one example explain Alien species invasion as one of the causes of Biodiversity losses.
______ refers to the conservation of endangered species outside their natural habitats.
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 in situ conservation method for national genetic resources?
Which one of the following is a natural cause of extinction of flora and fauna?
Which of the following is not a cause for loss of biodiversity?
What is common to lantana Eichhomia and African catfish?
Match the animals given in column I with their location in column II:
| Column I | Column II |
| A. Dodo | i. Africa |
| B. Quagga | ii. Russia |
| C. Thylacine | iii. Mauritius |
| D. Stellar's sea cow | iv. Australia |
Choose the correct match from the following:
What could have triggered mass extinctions of species in the past?
Explain as to how protection of biodiversity hot spots alone can reduce up to 30% of the current rate of species extinction.
Explain the concept of "co-extinction" by taking two examples.
List any three major causes of loss of biodiversity.
Which one of the following is a pair of endangered species?
Write any three criteria on which different types of reflexes are based.
