Is Evolution True - Essay Example

Evolution is the gradual process by which living organisms developed from simple life forms to complex forms leading to diversification in species and individual organisms. Darwin’s theory of evolution accounts for the various patterns of similarities and differences in living things found in different habitats over time (Coyne, 2010).

Charles Darwin’s theory of natural selection stipulates that evolutionary changes occur through the production of different genotypes and the differential survival of individuals with different combinations of characteristics. Individuals who have better survival characteristics will have a greater chance of reproducing and passing on those characteristics to their offsprings (Shubin, 2009).

Comparative anatomy is the evidence that two different species of animals share similar anatomical similarities such as similar bone structures. For example, whales and hummingbirds have tetrapod skeletons that are inherited from a common ancestor. However, their bodies have changed and parts have been lost through natural selection. Another example that clearly demonstrates this is the similarities between crocodiles and alligators (Coyne, 2010).

Comparative embryology is another concept supporting the theory of natural selection. All vertebrate embryos follow a similar developmental path because of their common ancestry. These embryos have a similar basic body plan due to the similar set of genes they exhibit. For example, the embryos of humans, fish, birds, and rabbits look very similar during the early stages. In addition, they all have gill slits and two-chambered hearts (Shubin, 2009).

In conclusion, evolution by natural selection can still be exhibited in day-to-day life. For example, nowadays bacteria and viruses are constantly becoming resistant to antibiotics that would work effectively previously. Also, if two people get into a fight, the strongest is likely to win, or whereby the strongest and fastest sperm cell usually fertilizes the ovum in reproduction.