Biological Evolution – Class 12 | Chapter – 7 | Biology Short Notes Series PDF

Biological Evolution

• Biological evolution is the progression of an entity’s hereditary features across successive generations of its population.
• Evolutionary changes in features occur whenever a variant is introduced into a population, whether by genetic recombination or mutations or through the elimination of genetic drift or natural selection.
• Biological evolution is a change in hereditary features in populations of organisms across generations.
• When variety is brought into the population by gene mutation or genetic recombination, or when variation is eliminated through natural selection or genetic drift, it is referred to as evolutionary modification of features.