The evolution of the eyes has attracted significant study with the study with the eye distinctively it is difficult to estimate the rate eye evolution becausethe fossil
record particularly of the early
Most populations changed from mostly light colored to mostly dark colored in the 1800s. This relates to microevolution.
A dog breathes in oxygen and then releases carbon dioxide when he exhales. Conversely, a tree gives off oxygen and takes in carbon dioxide. So the breath of the dog sustains the tree while the output of oxygen for the tree sustains the dog.
<span>Louis Pasteur, French scientist</span>
