Ed the Ned said:
If that environment is hostile (life threatening), anyone would have to change what they do to survive. This is passed down generations.
Behavior is not hereditary. Genes may be responsible for early brain development, but most complex behaviors (those that aren't reflexes or autonomous responses) must be learned.
why don't crocodiles look like fish and outer inland water creatures.
This really isn't a valid question. 'Why' implies purpose, and evolution has no 'purpose' in terms of human thought, since it is not the result of human thought.
(I am not being closed minded either, I believe I have a solid foundation in regards to my understanding of these things)
You are not being closed minded, but I wouldn't say you have a solid understanding of evolution. What people too often forget is that the present theory of evolution is the result of millions upon millions of man-hours of observation, experimentation, and synthesis. Not all of it can be derived intuitively (which is why it took until Darwin to even begin to figure it out), and as a result one needs to do outside reading if one is to effectively understand it. I posted a link to a video on the last page which explains the origin of life; there are other videos in the series that illustrate other evolutionary concepts. They're each only 10 minutes long, but they're very informative.
The first four:
The Origin of Life
http://www.youtube.com/watch?v=U6QYDdgP9eg
The Origin of the Genetic Code
http://www.youtube.com/watch?v=rtmbcfb_rdc
The Origin of Genes
http://www.youtube.com/watch?v=1w0FiwfyUMM
The Origin of Sexual Reproduction
http://www.youtube.com/watch?v=1w0FiwfyUMM
And remember, 'species', 'population', 'evolution', and 'natural selection' are arbitrary, man-made distinctions, and to really understand evolution requires you not to think in terms of these words if you can help it.
I am not a scientest and only recently, I have come to a decision to accept the seven literal day creation. This I know sounds strange to you. I cannot give you scientific evidence why I have made that decision. Its more a spiritual decision I have taken in my walk with God. That is something you cannot debate or I cannot explain.
The feeling of divine conviction and one-ness with god are caused by a momentary shift from left-brain-hemisphere dominant perception to right-brain perception. The body image and 'sense of self' are suspended, and one perceives without the filter of the left hemisphere. This experience cannot be verbalized, but carries with it a feeling of supernatural 'truth'. All of the multitude of religions throughout history have attributed this to a supernatural, nonhuman force because it is not consistent with 'normal' modes of thought. However, atheists are capable of achieving this state, and within the last century the biology of religion has to some extent been elucidated (and will even more so in the future). So yes, it is something that can be explained.