Evidence for Evolution By Katherine,Kathleen, Colleen, and Mikey.

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Presentation transcript:

Evidence for Evolution By Katherine,Kathleen, Colleen, and Mikey

Homologous Similar characteristics between species because of common ancestry. Vestigial Characteristics inherited through an ancestor that is not necessary and goes unused.

These leaves are examples of homologies because they have the same ancestor but they are different and function differently. These are examples of homologies because all of their lifestyles are different but share structural similarities in there limbs which proves they have a common ancestry.

Similar structures of the body between the hummingbird and the baleen whale. Similar structures between the ape and the man. Definition: Organisms that have common ancestry share anatomical similarities.

On the pig foot there are 5 digits but 3 of the 5 have shortened and are no longer used. The appendix is a structure in the human body that has a digestive function and until recent history was thought to be vestigial.

Definition: the study of organisms development as embryos. This can provide clues to their evolution. During embryoical development, snakes form hind- legs but lose them. This shows that some time during their evolution they possessed legs. As they develop as embryos, baleen whales form full-sets of teeth and then lose them. This shows them have toothed ancestors.