What is Photosynthesis? Definition, Meaning & Example
The process by which plants use sunlight, water, and carbon dioxide to make glucose and oxygen.
TL;DR: The process by which plants use sunlight, water, and carbon dioxide to make glucose and oxygen.
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Photosynthesis: The process by which plants use sunlight, water, and carbon dioxide to make glucose and oxygen.
Explanation
Photosynthesis is the most important biological process on Earth. It occurs in the chloroplasts of plant cells, where chlorophyll absorbs light energy. Plants use this energy to convert carbon dioxide from the air and water from the soil into glucose for food, while releasing oxygen as a byproduct. This oxygen is essential for respiration in all living organisms.
Example
A green leaf in sunlight converts 6CO2 + 6H2O into C6H12O6 (glucose) + 6O2. The plant uses glucose for growth and energy, and releases oxygen into the atmosphere.
Frequently Asked Questions
Why do plants need sunlight for photosynthesis?
Sunlight provides the energy needed to break down water molecules and convert carbon dioxide into glucose. Without light energy, the chemical reactions cannot occur.
Where in the plant cell does photosynthesis happen?
Photosynthesis happens in the chloroplasts, which contain the green pigment chlorophyll that captures light energy.
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