Part 1 of Essay
How do new and different species develop? How do existing species change over time? The answer to these questions is found through the process of . According to Monroe W. Strickberger, a professor at the University of Missouri in St. Louis, is defined as, "Genetic changes in populations of organisms through time that l ....

Part 2 of Essay
.... states that the changes that occur in animals through the principle of use and disuse are passed on to the animal's offspring (Strickberger 23). Lamarck's theory on was proven false because it incorrectly asserts that organisms can change their inheritable traits. This assertion was shown to be untrue when the theory of natural selection was conceived. The idea of natural selection was formed by both Charles Darwin and Alfred Russel Wallace in the mid-1800s. Unaware of each other's work, they dev ....