Question

Which of the following processes does not release carbon dioxide to the atmosphere?

• A. Photorespiration
• B. Respiratory activities of producers and consumers
• C. Decomposition
• D. Weathering of rocks

Answer 1

The correct option is D Weathering of rocks

Movement of nutrients occurs through various biotic and abiotic components of the ecosystem and is termed as biogeochemical cycle.
Carbon cycle is an example of gaseous cycle. Reservoir of the gaseous cycle is the atmosphere. Respiratory activities of the producers and consumers releases considerable amounts of carbon dioxide back to the atmosphere. Decomposition of waste materials and dead organic matter of land or oceans also releases some amount of carbon dioxide to the atmosphere. Apart from this, burning of wood, forest fires and combustion of fossil fuel, volcanic activity, deforestation, etc. releases carbon dioxide to the atmosphere.
Photorespiration is a metabolic process in plants wherein they release carbon dioxide into the atmosphere.

Weathering of rocks releases minute amounts of phosphorus which get dissolved in the soil solution and are then absorbed by the plants. Phosphorus is obtained by consumption of plants by animals and other herbivores. Phosphorus is released when phosphate-solubilising bacteria decomposes dead plants and animals. These processes are part of the phosphorus cycle.