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Pastimes : THE SLIGHTLY MODERATED BOXING RING
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To: Neocon who wrote (506)3/1/2002 3:55:14 PM
From: Lazarus_Long  Read Replies (1) of 21057
 
All speculative physics, my friend, but no more outrageous than speculations about The Big Boss In The Sky.

Why are there still plenty of unicellular organisms, but also organisms of increasing complexity?
Because there are niches for them? Demonstrably?
Take an anaerobic bacterium, stick a smaller aerobic organism inside it than can function as a mitochondrion. What have you got? A more complex bacterium that functions better aerobically. When that goes far enough, it can no longer live without O2.

How do we get to complex organisms?
Because organisms can gain advantage by having cells dedicated to specialized functions.

By cellular differentiation,I mean nerve cells and blood cells and muscle cells and so on. These things only have meaning within systems. How do we get them incrementally to differentiate and assemble? If you do not have the right tissue for blood vessels, and cannot get the blood in there, and do not have capillaries to spread the nutrients, and do not have a heart muscle tied to a pulmonary system within certain parameters, and a nervous system to regulate the heart beat, etc., it all falls apart.
Go read some zoology. There currently exist organisms with simple versions of all of those.
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