Advertisements
Advertisements
Question
Can you think of a situation where we deliberately want to make a species extinct? How would you justify it?
Advertisements
Solution
When alien species are introduced unintentionally or deliberately for whatever purpose, some of them turn invasive and cause the decline or extinction of indigenous species. Invasive weed species like carrot grass, lantana and hyacinth (Eicchornia) have become a threat to the environment and other native species. Similarly, the recent illegal introduction of the African catfish Clarias gariepinus for aquaculture purposes is threatening the indigenous catfishes in our rivers. We have to deliberately extinct these harmful species. Similarly, we aim to make the world polio-free by eradicating various viruses, including the polio virus.
APPEARS IN
RELATED QUESTIONS
Answer the following question:
Substantiate with the help of one example that in an ecosystem mutualists
(i) tend to co-evolve and
(ii) are also one of the major causes of biodiversity loss.
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?
______ refers to the conservation of endangered species outside their natural habitats.
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/are the type( s) of extinction of species?
Which among the following is a TRUE statement?
Which among the following is an exception to invasive species?
'The Evil Quartet' is a concept which describes the ______.
What do you understand by ‘exotic species’?
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 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?
Of the four major causes for the loss of biodiversity (Alien species invasion, habitat loss and fragmentation, over-exploitation and co-extinctions which according to you is the major cause for the loss of biodiversity? Give reasons in support.
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?
How many Biodiversity hotspots have been identified around the world?
Enlist two criteria that are used to identify a region for maximum protection as 'Biodiversity hotspots'.
"Forests provide intangible benefits to us." Explain by taking three different areas, how.
Which of the following suits hotspots in ecological terminology?
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.
Red Data Book is maintained by ______.
Which of the following regions of the globe exhibits highest species diversity?
What are the reasons for loss of biodiversity?
