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FW: New Fossil Protection Regulations in China



Hi Dann.
 
Brief comment .... for what it's worth.

----------------------------------------
> Date: Mon, 20 Sep 2010 13:25:44 +1000
> From: dannj@alphalink.com.au
> To: dinosaur@usc.edu
> Subject: Re: FW: New Fossil Protection Regulations in China
>
> On Mon, Sep 20th, 2010 at 12:59 PM, dale mcinnes wrote:
>
>>> From: david.marjanovic@gmx.at
>>>
>>> Natural selection is something the environment does, not something
>>> living beings (or genes) do. They are the passive part.
>>
>> WHAAAAAAAT???? I'm not really sure I understand you here. Natural Selection
>> is something the environment does. Correct. Living beings are NOT passive and
>> certainly DO select those genes that better express phenotypes that are more
>> sexually attractive to name one example [albeit .... indirectly].
>
> I believe you've just named the *only* example of living things creating 
> their own selective
> pressure. Even then, the reason why any particular species finds something 
> attractive or not is
> usually down to the genes they're carrying. Also, many 'attractive' traits 
> are indicative of non-
> visual fitness, such as health, bodily strength, or hormone levels. Thus some 
> genes that cause an
> appreciation for certain types of attractiveness can be beneficial in other 
> ways in the long term,
> and are ultimately more likely to become widespread than a gene that makes a 
> species find
> debilitating deformaties attractive.
 
The "only" example?? Hmmmmm ..... does "food procurement" come to mind?? But 
again .... I understand
what you are saying.       dale
>
> The majority of selective pressures however come from outside of the species. 
> Bacteria might be
> able to alter their genes via horizontal transfer, however more complex 
> lifeforms are stuck with the
> genetic cards they've been dealt with (unless they get lucky with epigenetic 
> traits).
>
> --
> _____________________________________________________________
>
> Dann Pigdon
> Spatial Data Analyst Australian Dinosaurs
> Melbourne, Australia http://home.alphalink.com.au/~dannj
> _____________________________________________________________
>