Advertisements
Advertisements
प्रश्न
What do you understand by ‘exotic species’?
उत्तर
Species which are not the natural inhabitants of the local habitat but are introduced into the system are called exotic species. There are many examples when a natural biotic community of the ecosystem suffered extensive damage because of the introduction of exotic species. During the last few decades, some animals like tigers, elephants, rhinoceros, crocodiles, minks, and birds were hunted mercilessly by poachers for their horn, tusks, hides, etc. It has resulted in the rendering of certain types of organisms as endangered category.
APPEARS IN
संबंधित प्रश्न
Give any 'two' examples of endangered species
Substantiate with the help of one example that in an ecosystem mutualists
are also one of the major causes of biodiversity loss.
Answer the following question.
Suggest two practices giving one example of each that help protects rare or threatened species.
Dodo bird, stellar sea cow and passenger pigeon are few examples of extinction due to ______.
Enlist any six categories into which a given species is placed once it has been thoroughly evaluated by IUCN.
Acronym for IUCN is ____________.
Species that possess a very high risk of extinction due to population decline of about 30 - 50 % over past 10 years are categorized as _______.
The Red List of threatened species is published by ______.
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.
'The Evil Quartet' is a concept which describes the ______.
Threatened species are those which ______.
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
Which of the following are major causes of species losses in a geographical region?
IUCN means
What is common to the species shown in figures A and B?
 |
 |
| A | B |
Though the conflict between humans and wildlife started with the evolution of man, the intensity of conflict has increased due to the activities of modern man. Justify your answer with suitable examples.
List any three major causes of loss of biodiversity.
"Forests provide intangible benefits to us." Explain by taking three different areas, how.
Which of the following suits hotspots in ecological terminology?
What is the sustainable use of resources?
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?
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 ______.
What is ex-situ conservation?
Mention any two places where the ex-situ conservation is undertaken.
Which one of the following groups faces maximum threat of extinction?
Name any two factors responsible for the loss of biodiversity in a geographical region.
