Thus the two key concepts of Darwinian Theory of Evolution are: 1. Scientists have discovered a wealth of evidence concerning human evolution, and this evidence comes in many forms. Fossil Evidence of Evolution Directions: On the line before each label, write the letter of its correct location on the scale. . Next lesson. Originally, scientists couldn't understand how the process of evolution began, but they later discovered that RNA possesses catalytic properties. Evidence of Evolution-Answers in gray Background When Charles Darwin first proposed the idea that all new species descend from an ancestor, he performed an exhaustive amount of research to provide as much evidence as possible. If we were to rewind the clock back about 70 million years, you would see dinosaurs roaming the Earth. Thousands of human fossils enable researchers and students to study the changes that occurred in brain and body size, locomotion, diet, and other aspects regarding the way of life of early human species over the past 6 million years. C. Evidences in favour of Darwinism: 1. Fossils provide solid evidence that organisms from the past are not the same as those found today; fossils show a progression of evolution. Phylogeny. •Evidence for evolution from microbiology •Basics of genetics •Ubiquitous proteins and DNA sequences •Evolution in the lab •Speciation in nature NOTE: many slides in the four evolution lectures obtained from Web sources: Ken Miller [“Hot Science, Cool Talks” at UT Austin], Elizabeth Saunders, Carl Wozniak, Caltech Bio 1 The fossil record. All cells on Earth, from our white blood cells, to simple bacteria, to cells in the leaves of trees, are capable of reading any piece of DNA from any life form on Earth. 2. 2. The theory of evolution is supported by biochemical evidence; many of the same molecules and biochemical processes occur within all living organisms, from single-cell bacteria to humans. Fossils, along with the comparative anatomy of present-day organisms, constitute the morphological, or anatomical, record. Today, the major pieces of evidence for this theory can be broken down into the fossil record, embryology, Practice: Evidence of evolution. This is very strong evidence for a common ancestor from which all life descended. The evolution of these genetic barriers to gene flow is the key to speciation – the elevation or evolution of new species. Remember the effect of gene flow is to homogenize populations- make them more alike while natural selection tends to accentuate differences but not always- remember stabilizing selection mode. Natural Selection. Evidence of evolution review. Evidence for Evolution. Origins and biochemical evidence. Every now and then, a “missing link” discovery claim is made, reinforcing this belief.2 The progression chain By far the most famous icon of evolution—seen everywhere from book covers to magazine articles to cartoons—is a drawing depicting part of this chain, namely human evolution from a primitive, stooping ape-like find evidence of them. The remarkable cases of resemblance e.g. Present this chart to the class. Branching Descent, and 2. By studying the basic biochemistry shared by many organisms, we can begin to piece together how biochemical systems evolved near the root of the tree of life. And this is a very nice picture here of a dinosaur enjoying a sunset at the beach. Conclusion This WebQuest was designed to help you locate evidence for evolution from different areas of science. 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