there are limits to how much an organism can change its own physiology

But in cases where species are under especially strong selective conditions,like those caused by rapidly changing climates,adaptive evolution can happen more quickly.In recent decades,we've seen many plants,animals,and insects relocating themselves and undergoing changes to their body sizes,and the dates they flower or breed.But many of these are plastic,or nonheritable changes to an individual's physical traits.And there are limits to how much an organism can change its own physiology to meet environmental requirements.