Slides in Natural Selection Discussion
"Nothing in biology makes sense except in the light of evolution."
Evolution is [the] change in the heritable characteristics of biological populations over successive generations. Evolutionary processes give rise to biodiversity at every level of biological organisation, including the levels of species, individual organisms, and molecules.
A mechanism of evolutionary change.
Variation in traits
A genetic trait that confers an advantage and leads to improved fitness and reproduction.
Without genetic variation, new traits cannot arise.