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superchunk on 10 September 2010
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Slimebeast said:
superchunk said:
Slimebeast said:
superchunk said:

@slimebeast

Its clearly evolution. Did you read the part about the calcium and how it is completely different between the egg laying southerners and the live birth northerners? Clearly they are adapting to the environment for the well being of the species. They have changed their bodily functions to have the beginnigns of a placenta and nutrient flow vs just egg laying.

No, I didn't see anything that suggested such a difference within this species. Can you show it, quote it?

It states that in egg laying animals the embroyo gets calcium nutrients from the egg itself, however since this lizard has not eggs but a very thin membrane it would be lacking the calcium and would have defects. In mammals, the uterus and subsequent placenta actaully connects the mom/child to provide this, as well as all other, nutrients. The northern lizards have begun this process by delivering the first nutrient required, i.e. calcium due to lack of thick shell. This is evolution of a placenta (similar to you mom's) where the mom/child are linked and all nutrients flow through.

You're making things up and even bringing my mom into this.

There was no such distinction between the northern and southern type of skinks. If there was then quote it.

It talks about egg laying animals and where the nutrients come from, i.e. the southern lizards. Then it talks about live birth animals like humans and where nutrients come from. Then it discusses how a lack of shell or thin shell would create deficiencies in the southern lizards. Then it discusses how that is solved and how that is a precursor to a placenta. Its the entire middle part of the article. Not quoting it and the summation line is quoted above by another user anyways. You're just being thick-headed and refusing to see the obvious. The live birth lizards are not just keeping the eggs inside longer, they are going through metabolic internal changes in their species to move away from eggs to live births similar to mammals.

This is the same if we observed huge differences in physical bodies/process between humans in Europe and those in Africa. Regardless if one is simply an adaptation to its environment, that is the whole point to evolution. The species evolves to the changes in the environment. It could be to totally replace the "inferior" characteristic or simply the divergence of the species based on isolated habitats, like the finches in the Galapagos Islands and their beak differences.