Comparative Anatomy Lab Report

POINTS FOR and/or AGAINST these evidences (+ elaboration and support for these points) Comparative Anatomy - For: the study of similarities and differences in the anatomy of different species. This can be seen in the comparison of a human hand, cat front paw, wale fin and bat wing, they all have a very similar bone structure and bones, pointing to a common ancestor and backing up evolution. Fossil Layers - For: There are fossils showing the process and the slow evolution of different animals becoming new ones. The fossils on the bottom layers of rocks are very different from the animals today, but as you go through the layers of fossils they become more like the animals we see today until they are almost the same. This backs up

The rocks are dated and this shows scientists a time scale of evolution and when different things occur. Similarities of Embryos: At the earliest stage of life (Embryos), humans and other animals look very similar to other animals, this is because they share the same ancient genes. e.g. fish, tortoise, chicken, pig, cows and human embryos at the beginning stages of life all have the same number of gill arches, even though most of these embryos don't keep the gill arches they all still start of as an embryo with them. This shows how many animal embryos start of with extremely similar characteristics pointing to a common a ancestor and common genes. Modern Examples: A modern example of where you can see the evolution of a species is in the Peppered Moth. In Britain during the industrial revolution the air became polluted with sot that covered the trees and killed of the lichen (fungi that grew on the trees) and blackened its bark. The pale, speckled moth which had camouflaged well before the blackening of the trees was now very