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प्रश्न
Which of the following statements is correct?
पर्याय
Parthenuim is an endemic species of our country
African catfish is not a threat to indigenous catfishes.
Steller' s sea cow is an extinct animal
Lantana is popularly known as carrot grass
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उत्तर
Steller's sea cow is an extinct animal
Explanation:
The Steller's sea cow (from Russia) is a recently extinct mammal, and parthenuim (carrot grass) is an alien weed that spreads quickly and harms native species.
African catfish is likewise an alien species that has a negative impact on the growth of our native species, claires batrachus.
Another alias species, Lantana camara, is a powerful competitor of native species.
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संबंधित प्रश्न
Can you think of a situation where we deliberately want to make a species extinct? How would you justify it?
Species that possess a very high risk of extinction due to population decline of about 30 - 50 % over past 10 years are categorized as _______.
Which among the following is an exception to invasive species?
'The Evil Quartet' is a concept which describes the ______.
Which among the following is an in situ conservation method for national genetic resources?
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?
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
What is common to the following plants: Nepenthes, Psilotum, Rauwolfia and Aconitum?
Discuss one example, based on your day-to-day observations, showing how loss of one species may lead to the extinction of another.
List any two major causes other than anthropogenic causes of the loss of biodiversity.
How can you, as an individual, prevent the loss of biodiversity?
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.
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.
Give definitions of Extinct species.
Give definitions of Endangered species.
What are the reasons for loss of biodiversity?
