To me, religion as a general topic comes down to a discussion of only a few basic points, with many stories, arguments, and other explorations evolving from each point. However, the fundamental questions addressed by all religions are still the same. Suffice it to say that the basic failure of any scientific assignment to the existence of god is its inability to do that which any scientific theory that is seen as useful must do, make predictions. If you are truly adhement about god as anything more than a starter force, then I have a separate essay which discusses god as governing power . Religion will then tell you that you must believe it.
Faith is the tool by which religion makes truth .
To me, it seems awefully short-sighted to put one's faith and living style into something that, by its very nature, cannot be proven. Answering the second question tends to lead to the biggest differences between religions. I will, therefore, not try to address the individual concepts raised by each religion. Humans are composed of carbon, oxygen, nitrogen, and hydrogen, along with a few other elements. From these basic elements, molecules, then cells, then more and more complex structures form.