Biology : Evolutionary Theory Of Evolution Essay

736 Words Apr 20th, 2016 3 Pages
YR 10 Science
Evolutionary Theory
Alicia Horsfield

Evolution can be defined as a gradual process in which a species changes into a different and more complex form. This happens over several generations. Evolution also proves that all species are related through genetic variation. (, n.e). Charles Darwin (1809-1882) was an English Naturalist, famous for creating the theory of ‘evolution’. He also created a theory that species survive through a process called “natural selection”. The species that successfully adapted to meet the requirements of their natural habitat lived on for generations while species that failed to evolve and breed died off (Bio, 2016). Charles Darwin has proof to back up that his theory of evolution, an example is Fossils and DNA sequencing.
Fossils are preserved evidence of past life. There a four types of fossils- original, replacement, carbon film and indirect. A fossil is the remainder, or the moulding, of an animal or a plant preserved in a sedimentary rock. ( Earth Observatory of Singapore, NTU, n.e) Palaeontologists use fossils to restructure the evolutionary pathway of plant and animals. One of the most important functions of fossils from a scientific perspective is that they create one line of evidence for understanding evolution. (Demand Media, 2001) An example of a fossil is the evolution of the length of a horse’s leg bone.
Figure One:
"THE PENTADACTYL LIMB." Joe Animal Adaptations. Weebly. Web. 20 Apr. 2016.
Figure one shows…

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