Large plants and animals differ more than small plants and animals.
Warm climate plants and animals differ more than cold climate plants and animals.
Water plants and animals differ more than land plants and animals.
Species of plants and animals that were cultivated less recently differ more than the uncultivated parent species in nature
It causes domesticated species to vary more than uncultivated parent species.
It has an effect only on primarily on the lifespans of domesticated species.
It has (primarily) a very temporary effect on domesticated species.
It causes the climates and conditions to slowly change to that best for the species.
A significant reduction in the overall variation of species.
Variation of species in domesticated settings.
A significant increase in disease among species.
A depletion in other resources necessary for life.
Species under cultivation.
Species that consume primarily animals.
Species that live primarily underground.
Species that have reverted to a wild form.
Descent with modification