[quote]Jab1 wrote:
miroku333 wrote:
valid points.
yes I have a grandfather (2 in fact!
) I am the same species.
the info about the swallows is interesting, as well as the interpretation of the placing of blow holes as timelined events.
the swallows (or whichever bird) I will maintain are all individual species with much in common.
the placement of blow holes I interpret much like finger prints, the exact placement does not mean a movement towards another species, the more favorable placements survived.
and regarding evolution of flippers to legs or vice-versa, I will again follow the line acknowledging similarities between individual species.
I do see where you’re coming from, and many years ago you could have been right, but other areas of biology all agree on this and really, further study will show why you’re wrong. In a word; atavisms.
In several, this is just one reason why you are wrong. Atavisms are evolutionary “throwbacks”. They are phenotypes occurring where you don’t expect them to. The most famous example is a chicken with teeth. This is an evolutionary throwback to an ancestor which did have teeth. The gene might not be active in chickens, but it remains in the genotype. In evolution, genes aren’t necessarily thrown away and can remain dormant in the genome. In fact we even have a vast amount of so called “junk” dna which doesn’t do anything (so far as we have ascertained).
Other examples of atavisms are hind legs in whales (which neatly conforms to fossil records) and extra toes on horses.
And yes, you are the same species as your father. This is the point I was trying to make; trace the line back from you, to our ape like ancestor 5 million years ago where we split from chimpanzees and if you “zoom in” to any point on the line, everyone you see will be of the same species. It is only in much vaster spans of time that we can see separate “species”.[/quote]
thank you for your polite demeanor, I’m usually called a lunatic and insults instead of information are thrown my way.
I have to admit you are far more knowledgeable than the average person I discuss this with, and I am enjoying the experience.
I will explore atavisms when I get the chance, this is a facet that I had only briefly encountered in the past.
however I’m presently at work, and need to get back to my scheduled rounds 