Biology form 5 kssm textbook - CHAPTER 1 : ORGANISATION OF PLANT TISSUES AND GROWTH

Variables Manipulated variable: The presence of water hyacinths Responding variable: Reading of ammonia at the end of the experiment Constant variable: Volume of lake water Materials: Eichhornia crassipes water hyacinths , 10 litre of lake water, 100 ml of 10% ammonium chloride solution, tap water, ammonia test kit Apparatus: Two glass containers with a 5 litre capacity Procedure Glass container Water hyacinth Lake water Bio Exploration Ammonia test kits can be obtained from aquaculture stores or aquarium stores.

Photograph1 Chernobyl nuclear plant in Russia a One of the methods used to treat the soil after the explosion is by removing pollutants through plants.