2.67a Excretion in plants

• Considering the process of photosynthesis
• Involves leaf absorbing light energy.
• In the process of doing so it combines C02 with water
• This forms molecules such as glucose.
• Gives off the gas oxygen, this is a waste molecule so is an example of excretion
• Respiration, aerobic respiration to supply oxygen.
• Through a series of enzyme reactions the glucose is broken down.
• The waste carbon dioxide and water. 
• Plants excrete water and excrete carbon dioxide.