The three levels of biodiversity
The three levels of biodiversity

Biodiversity is the variety of living organisms in an area. At A-level, it is described at three levels: genetic diversity, species diversity and ecosystem diversity.
Step-by-step lessons on Edexcel A A Level Biology Biodiversity, endemism and diversity indices. Each one builds up to exam-style questions. Build a strong foundation in cell biology and biochemistry early on, since later topics on genetics, ecology and physiology all draw on these core concepts.