From which stages does the carbon cycling occur?
(a) Dead organisms → Living organisms → Oceans
(b) Atmosphere → Living organisms → Dead organisms
(c) Oceans → Atmosphere → Dead organisms
(d) Atmosphere → Oceans → Living organisms → Dead organisms
This question was addressed to me in final exam.
This key question is from Ecosystem in section Ecosystem of Biology – Class 12
Right choice is (d) Atmosphere → Oceans → Living organisms → Dead organisms
The best I can explain: The carbon from the atmosphere in the form of carbon dioxide gets into oceans. Through this, the carbon enters into living organisms and then to dead organisms. This carbon from dead organisms enters the Earth’s crust.