1. Process of photosynthesis:
- involves the leaf absorbing light energy
- in the process it combines carbon dioxide with water to form glucose and gives off oxygen.
- CO2 + H20 ---> C6H12O6 + O2 (<-- waste molecule = example of excretion - release of metabolic waste)
2. Respiration:
- Glucose is required and oxygen (aerobic respiration)
- The molecules is broken down by enzymes to create ATP and carbon dioxide and water.
- C6H12O6 + O2 ---> ATP + CO2 (<--- waste molecule = excretion) + H20
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