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Home› UPSC CSE› Prelims GS Paper I› 2018 questions› Question 15

UPSC CSE Prelims

Subject: Environment & Ecology Chapter: Ecology And Functions Of An Ecosystem

2018 PYQ

Question 15

Which of the following statements best describes "carbon fertilization"?

Choose one answer AIncreased plant growth due to increased concentration of carbon dioxide in the atmosphere BIncreased temperature of Earth due to increased concentration of carbon dioxide in the atmosphere CIncreased acidity of oceans as a result of increased concentration of carbon dioxide in the atmosphere DAdaptation of all living beings on Earth to the climate change brought about by the increased concentration of carbon dioxide in the atmosphere

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Correct answer: A

Correct Option: A Explanation: Carbon fertilisation refers to greater photosynthesis and potential biomass production under higher atmospheric CO₂, provided water, nutrients and other conditions are not limiting. Option-wise Analysis: A: Correct - Correct-higher available CO₂ can boost plant growth under suitable conditions. B: Incorrect - This describes greenhouse warming, not plant carbon fertilisation. C: Incorrect - This is ocean acidification caused by absorbed CO₂, a separate process. D: Incorrect - Universal biological adaptation is not what the term means and is not guaranteed.

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