Question

In carbon cycle processes, carbon is used by plants to form organic molecules but most carbon is found in the atmosphere as carbon dioxide.
Which process is most responsible for removing carbon dioxide from the atmosphere?

• A. Photosynthesis
• B. Respiration
• C. Combustion
• D. Decopmosition
• E. Evaporation

Answer 1

The correct option is A Photosynthesis

A. Green plants capture solar energy and convert it into chemical energy by the process known as photosynthesis. During photosynthesis, carbon dioxide and water are transformed into simple carbohydrates and oxygen is liberated into the atmosphere. Photosynthesis is also called carbon assimilation.

B. The process of harvesting chemical energy for metabolic activities in the form of ATP by oxidising the food molecule is called respiration.

C. Combustion is the chemical combination of a substance with oxygen that results in the production of heat and light.

D. Decomposition is the process of breakdown of complex organic materials into simpler ones.

E. Evaporation is the conversion of water from liquid phase into gaseous phase i.e. vapours.

Hence the process most responsible for removing carbon dioxide from the atmosphere is photosynthesis.

So, the correct answer is 'Photosynthesis'.