How do species adapt to changing environments over time ?

By natural selection, the nature of species gradually changes to become adapted to the environments. This variation of traits in a population is what gives the organisms the ability to survive environmental changes. If not the species becomes extinct.

This type of galaxy is an approximately ellipsoidal shape and a smooth, nearly featureless image. they are the largest single star systems, in the universe and are built by the collisions of many smaller galaxies.