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प्रश्न
Suggest two practices giving one example of each, that help protect rare or threatened species.
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उत्तर
- By using cryopreservation (preservation at –196ºC) technique, sperm, eggs, tissues, and embryos can be stored for a long period in gene banks, seed banks, etc.
- Plants are propagated in vitro using tissue culture methods.
संबंधित प्रश्न
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.
Which among the following is/are the type( s) of extinction of species?
Accroding to IUCN Red list, the status of Antilope is ____________.
Which of the following is not a cause for loss of biodiversity?
The extinction of passenger pigeon was due to ______.
Which among the following forests is known as the "lungs of the planet earth"?
What is common to the following plants: Nepenthes, Psilotum, Rauwolfia and Aconitum?
What does 'Red' indicate in the IUCN Red list (2004)?
What is common to the species shown in figures A and B?
 |
 |
| A | B |
Discuss one example, based on your day-to-day observations, showing how loss of one species may lead to the extinction of another.
Gametes of threatened species can be preserved in viable and fertile conditions for long periods using ______.
Consider the following statements:
- Statement I: Endemism and accelerated habitat loss are characteristics of biodiversity hotspots.
- Statement II: Gene bank is an in-situ method of biodiversity conservation.
Choose the correct answer from the options given below.
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 ______.
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.
Give definitions of Endangered species.
Give definitions of Invasive species.
