ertebrates developed limbs that were supported by the backbone, and had watertight eggs.The Hall of Saurischian Dinosaurs and the Hall of Ornithischian Dinosaurs are more examples of evolution within vertebrates. However, these two halls do not have much in common with our line of ancestry except for the fact that a backbone and brain case are present; any other things in common with our lineage are but minor details. That is why the AMNH has another hall called Mammals and Extinct Relatives.The hall, Mammals and Extinct Relatives, is devoted to showing how all mammals evolved from the earliest forms of vertebrates. A big evolutionary change that separates mammals from other forms of animals is the development of the placenta and the formation of the middle ear. The hall that I believe to be the most interesting of all halls in the AMNH, is the Hall of Biodiversity. In this hall we can see a large spectrum of life from the broad “Kingdom” to the specific “Species” is found in this part of the museum. The amount of information that one can obtain from just this hall alone is overwhelming. From the simple far left (true bacteria) to the complex far right of the hall shows us a great difference in species as well as many similarities. But more importantly, the hall shows that many of the more complex living species today have evolved from another living or extinct species in the past. Furthermore, those living/extinct species in the past originated from another more ancient species, and so on.Natural selection is a nonrandom event and is a process that happens over large periods of time. The offspring that carry a certain trait that is favored due to a certain environment will be carried on more successfully by their offspring. Due to this process change, even if it is minute, will occur over a small number of generations. If such selection continues to occur more complex forms of a simpler body plan will ...
