Biology

colour blind mother x colour blind father

colour blind mother x normal father

carrier mother x colour blind father

carrier mother x normal father

The structure of the earth's surface

The influence of living organisms on each other

Temperature, rainfall and humidity

The influence of soils on plant and animals

parasitism

commensalism

saprophytism

holophytism

virus

protozoan

bacterium

fungus

prevent and control major disease

prevent diseases outbreak by administering vaccines

improve the health and nutrition of children and nursing mothers

monitir enviromental pollution