Question

Choose the correct sequences:

A. CO₂ in atmosphere → decomposers → organic carbon in animals → organic carbon in plants 

B. CO₂ in atmosphere → organic carbon in plants → organic carbon in animals → inorganic carbon in soil 

C. Inorganic carbonates in water → organic carbon in plants → organic carbon in animals → scavengers 

D. Organic carbon in animals → decomposers → CO₂ in atmosphere → organic carbon in plants

Answer 1

This is due to the fact that plants have the ability to use atmospheric carbon-di-oxide and convert it into organic compounds with the help of a process called "photosynthesis". Now, these organic forms of carbon i.e. sugars are stored by plants that are then consumed by animals. As animals die, their bodies are decomposed by the scavengers, and the organic carbon returns to the environment in inorganic form. Inorganic carbonates cannot be used by plants and thus can't be processed. Decomposers cannot feed on the combined form of CO₂ present in the atmosphere