Darwin's Theory of Evolution By: Emma Begg (James Lamarck (Theory of…
Darwin's Theory of Evolution
By: Emma Begg
Theory of Use and Disuse
All species evolve in response to its environment and better adapt to their environment.
When a feature is not in use, it becomes smaller and weaker, eventually becoming useless and a Vestigial Feature.
Theory of the Inheritance of Acquired Traits
Features that are adapted to benefit the species in their environment evolve with the species and into other new forming species.
Different species can have features that evolve from common origin but do not sever the same function anymore due to evolution and vice versa. This is comparative anatomy, they are called analogous and homologous features.
Georges Cuvier Theory of Catastrophism
Cuvier suggested that rare global catastrophes are to the reason for extinct species.
Natural selection happens overtime in contrast to catastrophism
Artificial Selection occurs in abrupt circumstances just like catastrophism explains.
While continuing to gather evidence to back up his controversial theory of natural selection, Alfred Wallace was in Malaysia developing the same theory.
Wallace reached out to Darwin with his similar ideas. His ideas were included in the final paper that Darwin submitted at a meeting of the Linnean Society.
A year and a half later, Darwin released a book about his theory on evolution that sold out on the first day. His success was impacted by Wallace's ideas since they were embedded in Darwin's work.
Charles Lyell's Theory of Uniformitarianism
Lyell's theory suggested that geological changes happen overtime due to natural process.
Darwin was inspired by such ideas and even had some of his own experience that proved the theory. He explained that the process of natural selection is always happening over time.
Radiometric dating of the Earth proves that the Earth is very old as Lyell suggested in his research
George Buffon believed that species could change over time.
Darwin concluded that species change by adapting to benefit them reproductively and environmentally.
Fossil records are very useful tools when discussing evolution and they can prove the theory of natural selection, as Darwin saw.
Fossil records show the progression of complexity in organisms overtime (adaptations).
Show that organisms that once lived can go extinct.
Voyage of the Beagle
Darwin discovered that there were different species of finches on varying islands. This helped further develop his theory.
He was introduced to how important biogeography is to prove his research.
Thomas Malthus' view on Population Growth
Malthus suggested that population growth would always overpower food supply causing a lot of problems for many species.
Naural selection explains how species adapt to such distinct problems in their environment.