Advertisements
Advertisements
प्रश्न
What criteria should one use in categorizing a species as threatened?
Advertisements
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.
APPEARS IN
संबंधित प्रश्न
Can you think of a situation where we deliberately want to make a species extinct? How would you justify it?
'The Evil Quartet' is a concept which describes the ______.
Which one of the following is a natural cause of extinction of flora and fauna?
What do you understand by ‘exotic species’?
What are the major factors that are responsible for the loss of biodiversity? What steps are needed to prevent them?
Which of the following are major causes of species losses in a geographical region?
Which of these is NOT amongst the effects of loss of biodiversity?
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?
What does 'Red' indicate in the IUCN Red list (2004)?
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.
The species placed in CR category is ______.
What is the sustainable use of resources?
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 ______.
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.
The sixth extinction in progress currently is different from all previous extinctions on earth as it is ______.
Give definitions of Invasive species.
What are the reasons for loss of biodiversity?
