Ms. Terrell
Pre-AP English 11
2 April 2010
In Evolution by Mark Ridley, he believes there is evidence to Evolution because there are certain genes that are the same in species, and these are called, homologies. Each species couldn’t be developed independently, according to Ridley, when he says, “Homologies fall into hierarchically arranged clusters, as if they had evolved from a tree of life, and not independently in each species” (43). He believes that evolution begins with a change on a small scale, to a larger scale, such as humans. He then goes on to say, that the adaptation in living things has no non-evolutionary explanation. Then, he says that the existence of evolution depends on what it’s being argued against.
In my opinion, I believe that Ridley’s theory about homologies is true because every species that are the same have at least one gene in them that is the same. If this wasn’t true, all species would have all different characteristics. His theory is saying the same thing as Darwin’s theory. They both said that the larger organisms come from two smaller ancestors. In some instances evolution can be ruled out but usually it’s not ruled out by a different theory. Everyone has their own opinion on theories of evolution, so it depends on what you believe in.
Ridley, Mark. Evolution. Australia: Blackwell Publishing, 2004. Print.
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