What is photosynthesis

Photosynthesis is the process where given plants or chlorophyllous organisms prepare or synthesis food carbohydrate from carbon dioxide and water in the presence of sunlight.

OR

Photosynthesis is the process by which simple inorganic substances, water and carbon dioxide are combined in the presence of sunlight and chlorophyll to form complex organic food substances such as glucose.

Oxygen is given out as a by-product.

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b tumor cells have a cell wall instead of a membrane

explanation:

tumor cells different from normal cells because tumor cells have a cell wall instead of a membrane.