The autotrophic mode of nutrition requires: (a) carbon dioxide and water (b) chlorophyll. (c) sunlight. (d) all of the above.

Answer: (d)

Autotrophic nutrition is a process where an organism prepares its own food from simple inorganic material like water, mineral salts and carbon dioxide in the presence of sunlight. It is found in plants. The process by which food is prepared is known as photosynthesis which requires carbon dioxide, water, chlorophyll and sunlight.

\(CO_{2} + H_{2}O \overset{Sun energy}{\rightarrow}C_{_{6}}H_{12}O_{6} + O_{2}\)


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