Micro-organisms constitute a very antique group of living organisms which appeared on the Earth's surface almost 3000 million years ago.

Taxonomy is the science that attempts to categorise the many millions of species on Earth. Find out how to define taxonomy, what taxonomists do and why classifying life is so important. The definition ...

The questions in this quiz are suitable for GCSE biology students studying classification of living organisms and the impact of modern developments of classifying systems. If you struggled with the ...

Original classification of living organisms containing four kingdoms (Monera, Protista, Vegetabilia and Animalia), 60 phyla and 254 classes, is presented. The classification is based on latest ...

How was the theory of evolution developed? - OCR 21st Century How is biodiversity threatened and how can we protect it? Sample exam questions - life on Earth - past, present and future ...