Evolution is the process by which living organisms originated on earth and have changed their forms to adapt to the changing environment. The earliest known fossil organisms are the single-celled forms which resemble modern day bacteria. These single-celled organisms date back about 3.4 billion years. Evolution has resulted in successive radiations of new types of organisms, some of which have become extinct, but most of which have developed into the present makeup of the present world (…showed first 75 words of 1635 total…

…showed last 75 words of 1635 total…Human beings are uniquely adapted in that they make and use tools and devices and invent procedures that give them extended control over their environments, such as medicine. Humans are also responsible for notably changing the environment itself. The effects are very perplexing, and misunderstood by all geologists alike and cannot be predicted, and yet the eventuality is that evolutionary patterns in the future will reflect the influence of the human species of today(Microsoft96).