Question

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

Answer 1

The correct option is C 1, 2 and 4 only

Carbon dioxide is critical for carbon cycle and critical for maintenance of Earth’s ambient temperature. Producers remove the carbon dioxide from the atmosphere and hydrosphere through the process of photosynthesis. They convert carbon dioxide to glucose. The process of respiration releases carbon dioxide back to air or water(aquatic ecosystem). Decomposers release carbon stored in bodies of dead organisms back to the atmosphere. Volcanoes emit carbon dioxide in two ways: during eruptions and through underground magma.