Animals adapting to the environment?

Hollis Demasters: If you look at the fossil record, just about everything eventually does adapt or go extinct. Mostly, things go extinct.However, some things such as sturgeon and turtles are well-enough adapted and live in stable enough environments that they can persist basically unchanged for hundreds of millions of years. Some bugs have done this, too....Show more

Gus Leiby: First off, penguins are birds and do not have fur - they have feathers. The idea behind survival of the fittest is that there is always genetic variation. So whoever has the veriation best suited to the environment will have a better chance of feeding itself and its young. Also, it will be more likely to be able to survive the conditions in the area, as well have increased mating success.Animals and plants and basically everything will either adapt or become extinct....Show more