Loading...
UPSC 2014: Which of the following adds/add carbon dioxide to the carbon cycle on the planet Earth? 1. Volcanic action 2. Respiration 3. Photosynthesis 4. Decay of organic matter Select the correct answer using the code given below.
(a)1 and 3 only
(b)2 only
(c)1, 2 and 4 only
(d)1, 2, 3 and 4
Attempt This Question
Not attemptedCorrect Answer: (c) 1, 2 and 4 only
Carbon dioxide is added to the atmosphere by volcanic eruptions (release of magmatic CO₂), by respiration of living organisms, and by microbial decay of organic matter. Photosynthesis, in contrast, removes CO₂ by fixing it into biomass. Hence statements 1, 2 and 4 add CO₂, whereas statement 3 does not; the correct option is ‘1, 2 and 4 only’. ([dalvoy.com](https://www.dalvoy.com/upsc/previous-years/2014/carbon-dioxide-sources-carbon-cycle-volcanic-respiration-decay))
Related Current Affairs
Related UPSC Questions
More from Biogeochemical Cycles & Earth Systems
2013moderate
Which of the following adds/add nitrogen to the soil? 1. Excretion of urea by animals 2. Burning of coal by man 3. Death of vegetation Select the corr
2011moderate
Human activities in the recent past have caused the increased concentration of carbon dioxide in the atmosphere, but a lot of it does not remain in th
2011easy
Consider the following : 1. Photosynthesis 2. Respiration 3. Decay of organic matter 4. Volcanic action Which of the above add carbon dioxide to the c
Related Environment & Ecology Topics
2014Sustainable Agriculture & Forestry
What are the significances of a practical approach to sugarcane production known as 'Sustainable Sugarcane Initiative'? 1. Seed cost is very low in th
2014Environmental Governance & Legislation
With reference to Bombay Natural History Society (BNHS), consider the following statements: 1. It is an autonomous organization under the Ministry of
Frequently Asked Questions
What is the correct answer to this UPSC 2014 Environment & Ecology question?▼
The correct answer is option (c): 1, 2 and 4 only. Watch the detailed video explanation in our Sherlocking Prelims course on UnlockIAS.
Which year was this Biogeochemical Cycles & Earth Systems question asked in UPSC Prelims?▼
This question was asked in UPSC CSE Prelims 2014, GS Paper 1, as Question 19. It falls under Environment & Ecology > Biogeochemical Cycles & Earth Systems.
What is the difficulty level of this UPSC question?▼
This question is rated "moderate". It requires sound conceptual understanding of the topic.
How many UPSC Prelims questions have been asked from Biogeochemical Cycles & Earth Systems?▼
UPSC has asked 8 questions from Biogeochemical Cycles & Earth Systems (under Environment & Ecology) across multiple years. Visit the topic page to see the full list and year-wise trends.