Question

Write the names of some excretory substances of plants.

Hint:

Plants’ wastes → “{O-C-W-G-L-A}” = Oxygen, CO2, Water, Gums, Latex, Alkaloids.

Answer 1

Step 1: Excretion in plants
Plants also produce waste materials during metabolic activities such as photosynthesis and respiration. Since plants do not have special excretory organs like animals, they remove wastes by different methods.
Step 2: Main Excretory Substances in Plants
Oxygen: Released during photosynthesis as a by-product.
Carbon dioxide: Released during respiration, especially at night.
Water vapour: Removed through transpiration via stomata.
Gums and Resins: Stored in old xylem vessels and eventually removed.
Latex: A milky secretion found in rubber plants.
Alkaloids: Such as quinine, morphine, nicotine, which are metabolic waste products.
Step 3: Examples
Neem tree produces bitter alkaloids.
Acacia tree excretes gum.
Rubber plant produces latex.
Final Answer:
Plants excrete substances like oxygen, carbon dioxide, water vapour, gums, resins, latex, and alkaloids as their waste products.