Earth supports life forms numbering more than

Earth supports 8.7 million different forms of life. Out of this, 6.5 million species inhabit the land and the rest 2.2 live in the oceans. This figure has recently been announced by the Census of the Marine life and is known as the global biodiversity of the earth. 

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.