Mechanisms of Evolution

Genetic variation produces new characteristics and, over generations, drives the evolution of species. But how do new gene types arise and what are the processes behind evolution? Biology - Adaptation And Evolution - Learning Points. Mutations of DNA are responsible for evolution. DNA mutation can be driven by two processes. Natural selection - we adapt to our environment to ensure survival. Random environmental changes that cause genetic drift. A Twig Curriculum Film. Delivering key learning points. Get straight to the facts in just three minutes – directly linked to core learning, Twig's curriculum films will fit neatly into your lesson plans.