Question 18 of 18advanced⚖️ EvaluateLong Answer5 marks

Can you think of a situation where we deliberately want to make a species extinct? How would you justify it?

Correct Answer

Yes, there is a situation where we may deliberately want to make a species extinct. This applies to exotic species – species which are not the natural inhabitants of a local habitat but are introduced into the ecosystem.

The context states that exotic species can cause extensive damage to the natural biotic community. There are many examples where natural ecosystems suffered severe damage due to the introduction of such species. These introduced species often outcompete native species for resources.

Biological invasions by exotic species are identified as one of the major causes of high extinction rates at present, alongside habitat loss and fragmentation, over-exploitation, and co-extinctions. Currently, more than 15,500 species face the threat of extinction.

The justification for deliberately causing extinction of exotic/invasive species would be to protect native biodiversity. Since communities with high diversity tend to be more productive and resistant to biological invasions, removing invasive species helps preserve the ecological balance and protects numerous native species from extinction.

This can be justified as a necessary measure to fulfill our ethical responsibility towards native species, which have an intrinsic right to exist in their natural habitats without facing threat from human-introduced exotic species.

Exercise: EXERCISES | Q: 10 | (Page 12)
For More Understanding

Explanation

The textbook context specifically mentions exotic species as causing 'extensive damage' to natural biotic communities when introduced. While the text emphasizes that it is 'morally wrong to voluntarily cause the extinction of any species' and that each species has an 'intrinsic right to exist,' the exception is exotic/invasive species that threaten native biodiversity. The context identifies 'biological invasions' as one of the major causes of current high extinction rates. This is a standard NCERT Biology Class 12 (Chapter 15: Biodiversity and Conservation) question that tests students' understanding of when conservation ethics may support elimination of certain species to protect broader ecosystem health.

Solution Steps

  1. Step 1: Identify the scenario from context - exotic species causing damage to ecosystems

  2. Step 2: Explain what exotic species are and how they threaten native biodiversity

  3. Step 3: Link biological invasions to current extinction rates

  4. Step 4: Justify elimination of exotic species to protect native species and ecosystem functioning

  5. Step 5: Conclude by balancing the ethical principle with practical conservation needs