Biology Presentation

There was a Biology Presentation on 23rd September, 2014. Although the science students know that I did not do it well and I did not had strong points... blah blah blah. Miss Naudyah had requested me to make the presentation available to every science student. So here is the link for it. I am also planning to do it better, so I request that you comment on this post and tell me the points which you think should be essential for the topic: Chemical Factors Affecting Distribution of Organisms.