SCI 207 Dependence of Man on the Environment

I would prefer some one that has taken this course before to assist me in this. This is a 2 part assignment. The initial post is due by 0800 est on 07/02/13 and a response to 2 classmates initial pos is due by 1000 est on 07/04/13. 
Verbatim Discussion Instructions.
Biomes and Diversity

As you have learned in the readings, extinction is a natural selection process. You have also read that humans are often responsible for accelerating this process. Using at least two scholarly sources, address whether or not we as humans should be concerned with the extinction rate. Additionally, discuss whether or not humans strive to preserve representative samples of all biomes on the planet.Your initial post should be at least 150 words in length. Utilize at least two sources in addition to your text to support your claims. Cite your sources in APA format.