Charles Darwin and the Tree of Life

After watching the video: Charles Darwin and the Tree of Life, answer the following questions.

http://topdocumentaryfilms.com/charles-darwin-tree-life/
How is the analogy between the intricate parts of the human eye and the parts of a watch used by some people to argue against evolution? What evidence is presented in the video that contradicts this? Why were Gregor Mendel’s discoveries, and those of Watson and Crick, so important to our understanding of evolution? When did life on earth begin? When did insects and amphibians appear? What is the difference between amphibians and reptiles? When did dinosaurs become extinct? One branch of dinosaurs survived, which one? How are mammals different from other animals?