Tispower1 said:
ManusJustus said:
blackstar said:
ManusJustus said:
We are. Evolution is a gradual process, so you'll be much better off looking for 'evolution' in bacteria that rapidly reproduce, you may even do this in a high school or college experiment.
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i don't know, the only thing i know about bacteria that might help the evolution theory is that they do develope antibiotic resistance but so do all the living creatures
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Developing antiobitic resistence is an example of evolution. Bacteria are exposed to a new environment (drug, poison, changes in salinity, temperature, etc.), and some bacteria die while others live. If a bacteria has a genetic mutation that allows it to survive, then it passes that trait down to all its off spring.
If you have a dish full of bacteria and introduce them to antibiotics and one survives, in a short time you will have a full dish of bacteria that evolved a new trait. That is why we have to develop new medicines all the time, bacteria are evolving to survive a change in their environment. Now, one trait may not seem that big a deal, but after tens of thousands of years the continual development of new traits will create an organism that is easily distinguishable from its ancestors, thus evolution.
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Yes but for evolution to work through the ages, there has to be the addition of new, more complicated information into the organism, in that example, that just isn't happening.
With regards to those skulls, last time I checked they work out each skull from like 3 fragments, and an ankle bone, there's very little skeletal bits left in order to track the evolution of humans, let alone find a common ancestor. Plus, ever heards of the cambrain explosion? Been nicknamed the 'biological big bang'.
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The cambrian explosion is only an explosion on the geological timescale - it still took several million years. Add to that the fact that there is growing evidence that some advanced life had already evolved in the precambrian peroid and it really isn't that much of an explosion.
Also new more complicated information comes from mutations of old information and through one of the mutations of DNA being random duplication of segments of DNA.
Oh and those skulls are real images of skulls I think, not reconstructions. Here are some more photos.
http://en.wikipedia.org/wiki/List_of_human_evolution_fossils
