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

Biological Evolution: It is the change in inherited traits over successive generations in populations of organisms. Adaptation is a key evolutionary process in which variation in the fitness of traits and species are adjusted by natural selection to become better suited for survival in specific ecological habitats. The environment acts to promote evolution through changes in development. Therefore, determining how developmental changes are mediated is critical for understanding the mechanisms of evolution.

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.

JOIN OUR TELEGRAM CHANNELS
Biology Quiz & Notes Physics Quiz & Notes Chemistry Quiz & Notes

Follow on Facebook

By Team Learning Mantras