Monday, May 9, 2011

Evolution take Home Essay

Biology: Evolution




In the past there were many great scientist but here I'll talk about a few. Some of the few are Charles Darwin, Jean Lamarck, George Cuvier and Erasmus Darwin.

Each one of these men had theories. They were all different from each other. Lamarck theory was towards changing the environment Darwin’s theory was towards animals.

The different between these two theories is that Lamarck theory focuses on environment changing. Creating the need to change. Development of new features in order to survive and newly acquired traits somehow get passed down to off spring.

As for Darwin his was variations of heritable features which already normally exist. Environment “screens out" and traits which help survival tend to survive and have more off spring who inherit those traits.

Those two people have one thing in common and that is they'll be new species eventually leading into that we go into microevolution. According to the authors microevolution is evolution on a small scale. With that involves population. According to the authors population means a group of organism that interbreeds with each other. There is also micro evolutionary mechanism. They include mutation genetic drift migration and natural selection. Mutation means having green genes. Migration means green flow. Genetic Drift means produced and natural selection means predation.

In the theory i am convinced that species have changed over time. You can look at different types of animals on line of the same species and see how they are different. So yes i am convinced that species have changed over time and i believe that they will continue to change over time as we go in further years.