Evolution, religion, and ignorance.

[downbeatplumb]

No because evolutionary pressures will come into play.
These pressures are whatever will help the creature out breed or out live any competitors.
That is all, its very simple and elegant and supported by the evidence.

RDK: No, you have no evidence for that.

DBP: What is 'evolutionary pressure'? There are no pressures that 'help' a creature - that's not how evolution works.

Pressures may have been a poor choice, but basically its what helps passes on its genes successfully to out perform rival genes for what ever reason.

I was thinking of things like a bird having a slightly longer beak that can get to more intractable worms and so be a more successful feeder, which could make all the difference come a famine.

That kind of thing.

or as Wikipedia says.

Any cause that reduces reproductive success in a proportion of a population, potentially exerts evolutionary pressure or selection pressure.[1] With sufficient pressure, inherited traits that mitigate its effects - even if they would be deleterious in other circumstances - can become widely spread through a population. It is a quantitative description of the amount of change occurring in processes investigated by evolutionary biology, but the formal concept is often extended to other areas of research.

http://en.wikipedia.org/wiki/Evolutionary_pressure

[Chas]

RDK: No, you have no evidence for that.

DBP: What is 'evolutionary pressure'? There are no pressures that 'help' a creature - that's not how evolution works.

Pressures may have been a poor choice, but basically its what helps passes on its genes successfully to out perform rival genes for what ever reason.

I was thinking of things like a bird having a slightly longer beak that can get to more intractable worms and so be a more successful feeder, which could make all the difference come a famine.

That kind of thing.

Ok, good. Carry on.