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Evolution

Evolution. Grant Rios Clae Macke. WHAT IS EVOLUTION?. Gradual process in which something changes into a different and usually more complex or better form.

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Evolution

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  1. Evolution Grant Rios Clae Macke

  2. WHAT IS EVOLUTION? • Gradual process in which something changes into a different and usually more complex or better form. • Change in the genetic composition of a population during successful generations, as a result of natural selection acting on the genetic variation among individuals, and resulting in the development of new species.

  3. Charles Darwin Charles Darwin died at the age of 73 (12 February 1809 – 19 April 1882).Darwin developed a scientific theory to explain how evolution, or change over time, occurs in living things. Darwin’s theory explains how modern organisms have evolved over long periods of time through descent from common ancestors.

  4. Charles Darwin’s Epic Journey • Darwin set sail in 1831, to the galapagos islands. • Charles Darwin was only twenty when he left England in 1831. Thirty years later he published his theory of evolution, one of the most questionable revolutionary ideas science has ever known. • For thirty years, Darwin observed species on the islands, on how some specie populations grew and some dropped.

  5. The Galapagos Islands • The Galapagos Islands are located west of South America, nearest to Ecuador. • There are a total of 16 separate Islands (or “mini Islands”) in the galapagos island region. • One of the main questions Darwin wanted to find out that is not yet answered is; “how did so many different plants and animals arrived on the islands in the first place?” • Mainly known for the abundance of wildlife animals and plants

  6. Natural Selection • Natural Selection is the process by which biological traits become more or less common in a population due to consistent effects upon the survival or reproduction of their species. It is a key mechanism of evolution. • Darwin is generally credited with the theory of evolution by natural selection. Natural selection is that the strongest survive and propagate and therefore increase the strength of the species.

  7. Evidence of Evolution • Homologous structures are shared by related species and have been inherited from a common ancestor. Similarities and differences among homologues structures help determine how recently two groups shared a common ancestor. • Analogous structures are body parts from different kind of species and that operate the same body functions.

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