This course is designed to promote continuity, coherence and progression within the study of biology. It covers three units that include: physiology and ecosystems physiology and ecosystems, biochemistry, genetics and evolutionary trends, assessment of investigational and practical skills in biology. Physiology and ecosystems physiology and ecosystems deals with homeostasis, immunity, coordination and control in plants and animals, and ecosystems. Biochemistry, genetics and evolutionary trends deals with respiration, photosynthesis, dna as the genetic code, gene technology, genes and patterns of inheritance, mechanism of change, kingdom plantae, and kingdom animalia. Assessment of investigational and practical skills in biology is a practical investigation that is planned, implemented, analysed and interpreted by the participants working independently with minimal guidance.