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photosynthesis  is a process by which plant make their own food in the presence of sunlight ,oxygen water ,chlorophyll and minerals

respiration is a process in which the food is broken down into simpler units in the presence of oxygen and produces carbon dioxide water and energy

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1.Photosynthesis is a process by which green plants manufacture food.
2.It requires sunlight.
3.Carbon Dioxide is used and Oxygen is liberated.
4.It takes place only in cells of green leaves and young green leaves.
5.It takes place only during the day.

1.Respiration is a process by which food is broken down to liberate energy.
2.Light is not essential.
3.Oxygen is used and carbon dioxide is liberated.
4.It takes place in all parts of a plant.
5.It takes place day and night.