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   Creationism vs Evolution Debates
     Evolution?
       some awkward questions

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Heyho all.  Just wandering if any decent evolutionists out there can tell me how these various methods developed via evolution.  OK, probably the one im having most trouble getting my head round is metamorphasis.  The theory for seperate organs, processes, animals, cells etc i can understand.  But just how did metamorphasis come about.  

And just the second one for now.  why are tree's green.  Surely a much more sensible colour would be purple, more central in our spectrum, more of it recieved.  I mean black would also be a great colour, but im willing to accept reasons like far too much heat exchange, and just unlikely for an system of evolution to come about for all colours once it found the first (and according to the theory purple ones would win in the primordial soup, and so purple should be the dominant colour)

Decent scientific reasoning if pos, thnx.

Cheers,

(BTW, creationism answers for the green leaves one would be good too.)

Unseul

 


Posts: 0 | Posted: 2:08 PM on June 22, 2003 | IP
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Unseul,

The middle of the visible spectrum is actually green.  The left end is red, the right end is violet/purple.

There's actually a really old kind of bacteria which filters out red and blue light (purple) for energy.   The resulting light is green.  Early plant life in the ocean would receive all the green light that the bacteria didn't take.

Here is some more info: Why are trees green?

Metamorphosis may have arisen when some change caused the growth process of the insect to occur in spurts, rather than gradually.  This would allow the different states to occupy different niches in an ecosystem and then the various levels of development wouldn't compete with each other (a caterpillar doesnt eat the same food as a butterfly).
 


Posts: 0 | Posted: 4:59 PM on June 22, 2003 | IP
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Heh, well thanks for the links.  In actual fact i was fully aware of the green leaves thing (in actual fact i was taught it by the man whose link you refered me to (Goldsworthy is the daddy of lecturers).

The metamorphasis was a bit more of me wanting to know of more information, i reasoned out the seperate niches myself (after posting), i was just wandering if there was anyone out there with a decent explanation.

Unseul
 


Posts: 0 | Posted: 10:19 AM on June 23, 2003 | IP
    
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