Study Hints at How Genetic Mutations Led to Macroevolutionary Change

Scientific American ^ | Kate Wong

[tallhappy]

I will add that there seems to be no verb form for the word speciation

Speciate.

[tallhappy]

No. Where does the idea that species are defined by simply not breeding, not the inability to breed and produce offspring?

A thousand years ago people in Africa, Europe and America would have been different species.

[Registered]

Whew! Now that that's been figured out, explain the origin of symbiotic relationships?

[RightWhale]

Speciate is intransitive. I should have said transitive verb, implying an actor. Does something cause speciation? Can you cause speciation? Or does the organism just spontaneously speciate because it is speciation time?

[ThinkLikeWaterAndReeds]

Let us assume for a moment that macroevolution does exist. Let us also assume for a moment that the big bang theory is true. Hold on there you creationists, don't click the "post reply" button just yet. Prior to the big bang, there must have been something to go BANG, and there must have been some mighty force to ignite that something that went bang. Let us also assume that the creator of that something and the ignitor of that something was a force that some have come to know as a GOD. This creative power (a GOD in this example) could have devised a scheme that we refer to as macroevolution, as the mechanism that leads to the human. The point of evolution where the human emerged could have well been preordained. This still would be creation would it not?

[Registered]

Family portrait of my brine shrimp.

[twigs]

This usually results in the two species being genetically different because of breeding only within the immediate group.

For people who believe that man originated from one Adam, could this not explain the differences among people groups?

[realpatriot71]

A thousand years ago people in Africa, Europe and America would have been different species

This would be true if when these humans met they did not breed. Separate species when placed together will not breed with each other for various reasons as mentioned before. Humans, being rational, can choose not to breed, but we obviously can.

[tallhappy]

Where are you getting this revisionist definition?

[realpatriot71]

For people who believe that man originated from one Adam {and Eve}, could this not explain the differences among people groups?

Yes it can explain the differences.

[realpatriot71]

It's not revisionist. What is your problem with it?

[twigs]

Thank you. How long do you think such change as we see it today would take in man?

[cynicom]

If this is acceptable, it would seem that over millions of years there would have been more numerous and wider varying mutants.

[realpatriot71]

Yes that would be creation. However, the creation account mentioned in the Bible tells of a fully formed man, not an evolved men.

[tallhappy]

See:

Annu Rev Pharmacol Toxicol 2002;42:181-208 Molecular basis of environmentally induced birth defects. Finnell RH, Waes JG, Eudy JD, Rosenquist TH.

The molecular basis still isn't known.

[tallhappy]

It's not revisionist. What is your problem with it?

Revisionist or not, I'm asking where this is taught.

Who pioneered this view?

[realpatriot71]

LOL

I had forgotten that Sea Monkeys are brine shrimp. I always killed mine.

[realpatriot71]

Speciation of man. It's an interesting quetsion. I really think we're able to move about too easily for this ever to happen on Earth. The only was I can forsee and future speciation would be if man began colonizing the galaxy. I think the distances and time it would take to move about the galaxy could allow for speciation.

[realpatriot71]

I don't know about pioneering, but I learned this in my undergrad freshman biology class. I wouldn't think it would be taught any different anywhere else.

[twigs]

I'm sorry. I didn't make myself very clear. I wasn't talking about speciation. I was referring to the physical differences among different people groups. If everyone descended from an Adam and Eve, how long would it take, given the proper separation, for man to develop the physical differences we witness today.