GCE O-level Biology Archives

Human health and diseases – Diet

A balanced diet A balanced diet is one which contains adequate amounts of all the necessary energy and

Transpiration Transpiration is a method of transporting fluids (water and minerals) around and out of the plant. Water

Plant Tissue Structure of the Plant Part of the Leaf How is it adapted for photosynthesis and

Reproduction Meiosis leads to non-identical cells being formed while mitosis leads to identical cells being formed. Sexual reproduction

During puberty reproductive hormones cause secondary sex characteristics to develop. Oestrogen is the main female reproductive hormone produced

Characteristics of Living Organisms Movement: action by an organism or part of an organism causing a change of

Cell structure and Organization All living things are made of cells. A cell is the smallest (they

Asexual Reproduction The process resulting in the production of genetically identical offspring from one parent. Bacteria: Reproduce by

Variation Variation: differences between individuals of the same species Phenotypic variation is caused by both genetic and environmental factors