Question

Choose the correct sequences.

• A. $C{O}_2$ in atmosphere $\to$ decomposers $\to$ organic carbon in animals $\to$ organic carbon in plants.
• B. $C{O}_2$ in atmosphere $\to$ organic carbon in plants $\to$ organic carbon in animals $\to$ inorganic carbon in soil.
• C. Inorganic carbonates in water $\to$ organic carbon in plants $\to$ organic carbon in animals $\to$ scavengers.
• D. Organic carbon in animals $\to$ decomposers $\to C{O}_2$ in atmosphere $\to$ organic carbon in plants.

Answer 1

The correct option is B $C{O}_2$ in atmosphere $\to$ organic carbon in plants $\to$ organic carbon in animals $\to$ inorganic carbon in soil.

Nutrient cycles circulate matter through the biosphere. The nutrients regularly alternate between living (biotic) and nonliving (abiotic) components. Hence the nutrient cycles are also called as biogeochemical cycles. The important nutrient cycles are water cycle, carbon cycle, nitrogen cycle, mineral cycle. In the carbon cycle, atmospheric carbon is fixed into organic compounds like carbohydrates by green plants during the process of photosynthesis. The organic compounds are consumed by heterotrophic organisms like animals. The waste materials of animals and dead bodies of animals and plants are acted upon by detrivorous organisms, releasing the mineral nutrients like carbon, nitrogen, sulphur etc back to the environment.