Variation within populations
Variation within populations
A species is a group of organisms that can breed together to produce fertile offspring, while a population is all members of one species living in the same area at the same time. Evolution starts by looking at differences within such a population.
Step-by-step lessons covering OCR GCSE Biology Natural selection and evolution for Foundation and Higher tier. Each lesson works through exam-style questions in the written papers format. Start with the foundational topics and build up to the higher-tier material.
