UMass Amherst BIOLOGY 280 - Evidence That Evolution Has Occurred (3 pages)

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Evidence That Evolution Has Occurred



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Evidence That Evolution Has Occurred

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More evidence that Evolution has occurred. More about morphology. Pre-naturalist groundwork


Lecture number:
2
Pages:
3
Type:
Lecture Note
School:
University of Massachusetts Amherst
Course:
Biology 280 - Evolution:Diversity of Life-Through Time

Unformatted text preview:

BIO 280 1st Edition Lecture 2 Outline of Last Lecture I What is evolution II Evidence that evolution has occurred Outline of Current Lecture II Continuation of Evidence that evolution has occurred a More on Homology b Vestigial traits III Evidence of Change over time a Viewing evolutionary change IV View of Evolution Pre naturalist Era a 17th century groundwork Current Lecture Evidence That Evolution Has Occurred Continued Humans and mice haven t had a common ancestor for 65 million years but we both have very similar DNA sequences homology More differences in DNA the more distantly related they are in an evolutionary standpoint Synapomorphies fossils and bones from different organisms that share a number of vital skeletal traits Vestigial Traits type of homology no longer used for the function of which it was evolved o Whales and snakes have lost their limbs over time however they have remnants of hind limb bones hip bones inherited from common ancestors maybe shared from salamanders o Ostriches still have wings but they cant fly wings are vestigial o Human tail bone Molecular vestigial traits o The GULO psudogene o L gulono y lactone oxidase o Almost all animals have this pathway that converts glucose to vitamin C humans cant make this anymore The gene is still there but it is mutated to the point where it no longer functions anymore It is now a Pseudogene Evidence of Change Over Time Evidence of change over time o Fossils structures left from organisms that no longer exist anymore Pointing to a change over time extinct organisms o Law of succession because of these fossils series we will tend to find ancestor fossils in the same place we find their living decedents These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute Ex New Mexico armadillos fossil of ancestor armadillos found in New Mexico Fossil series Transitional forms progression of organisms with moderate



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