BIOL - Excretion In Plants
Biology, Flowering plants | IB | IGCSE | GCE | AP Biology | HKDSE
Question: 2.67 Understand the origin of CO2 and O2 as waste products of metabolism and their loss from the stomata of a leaf.
Excretion in plants
Plants need to excrete excess carbon dioxide and oxygen. Carbon dioxide is a waste product of aerobic respiration in plant cells. oxygen is a waste product of photosynthesis.
Unlike animals, plants do not have special excretory organs. Excess carbon dioxide and oxygen are excreted from the plant through the stomata in the leaves.
All Chemical Reactions that Take Place inside Living Cells
Metabolic Reactions that take Place in Plants are:
AEROBIC RESPIRATION: The Breakdown of Glucose to release Energy in Cells in the Presence of Oxygen to Produce Carbon Dioxide and Water (and Energy)
Glucose + Oxygen → Carbon dioxide + Water
C6H12O6 6O2 6CO2 H2O
*As a Waste Product, Plants will Produce Carbon Dioxide and Oxygen which will be removed through the Stomata (When it is Open) by Diffusion*
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