Human health and diseases – Diet
A balanced diet A balanced diet is one which contains adequate amounts...
GCE O-level Biology
Transpiration and translocation
Transpiration Transpiration is a method of transporting fluids (water and minerals) around...
Plant tissue and Transport in plants
Plant Tissue Structure of the Plant Part of the Leaf How...
Asexual and Sexual Reproduction
Reproduction Meiosis leads to non-identical cells being formed while mitosis leads to...
Menstrual Cycle
During puberty reproductive hormones cause secondary sex characteristics to develop. Oestrogen is...
Classification of Living Organisms
Characteristics of Living Organisms Movement: action by an organism or part of...
Cell structure and organisation
Cell structure and Organization All living things are made of cells....
Reproduction
Asexual Reproduction The process resulting in the production of genetically identical offspring...
Variation & Selection
Variation Variation:Â differences between individuals of the same species Phenotypic variation is caused...