Photosynthesis
* Starting Materials (Reactants):
* Carbon dioxide (CO₂): Obtained from the atmosphere.
* Water (H₂O): Obtained from the soil.
* Sunlight: Provides the energy to drive the process.
* Products:
* Glucose (C₆H₁₂O₆): A sugar molecule that serves as a primary energy source for the plant.
* Oxygen (O₂): Released into the atmosphere as a byproduct.
Cellular Respiration
* Starting Materials (Reactants):
* Glucose (C₆H₁₂O₆): Obtained from food.
* Oxygen (O₂): Obtained from breathing.
* Products:
* Carbon dioxide (CO₂): Released as a waste product.
* Water (H₂O): Released as a waste product.
* Energy (ATP): The primary energy currency of cells, used for various cellular processes.
Key Relationship
Notice the complementary nature of these two processes:
* Photosynthesis uses carbon dioxide and water to produce glucose and oxygen.
* Cellular respiration uses glucose and oxygen to produce carbon dioxide and water (along with energy).
This interplay allows organisms to cycle energy and essential molecules within ecosystems.
