Question

Where do plants get each of the raw materials required for photosynthesis?

Answer 1

Hint: One of the most required raw material is the gas that all animals exhale and another important material is the one which covers 71% of earth.

Complete answer:
Photosynthesis is a biochemical process where conversion of energy obtained from sunlight occurs and the solar energy is converted into chemical energy of food. Three raw materials are required by plants for the process of photosynthesis.
-Carbon Dioxide- It is obtained by plants from the earth's atmosphere.
-Water- It is absorbed by plants from the soil.
-Sunlight- Without sunlight photosynthesis would not be possible. It is the primary source of energy on earth.

Additional Information: -Photosynthesis was observed for the first time in cyanobacteria.
-The energy received from sunlight is converted into the chemical energy of food.
-It is an oxidation-reduction reaction where oxidation of water occurs to O2 and the reduction of carbon dioxide occurs to sugars.
Several theories about how plants do photosynthesis have been given by many scientists:
-Aristotle and Theophrastus: Proposed that food was absorbed by plants from the soil.
-Stephan Hale: Proposed that plants obtain food from leaves.
-Ingen-Housz: Proved that plants purify the air in the presence of sunlight.
-De-Saussure- Proved that water is significant for photosynthesis.
-Blackman: Gave the law of limiting factors.
-Engelmann: Plotted the action spectrum for photosynthesis.
-Ruben, Kamen, and Hashid demonstrated that oxygen in photosynthesis comes from water.

Note: The end products of photosynthesis are carbohydrates and oxygen, but it has to be remembered that oxygen is not the main product. It is a by-product of photosynthesis. Photosynthesis is an exothermic reaction which means that energy is released during the process. Therefore 100% conversion of solar energy to chemical energy is not possible and some amount of it is lost during the process.