Question regarding Evolution. Please answer.

[Quahom1]

Originally Posted by juantoo3

...According to Gould, bacteria will continue to survive long after even the cockroaches have disappeared. Path of one touched on some important matters concerning this, but Gould was of the opinion that single-celled creatures were the source and well-spring from which all other life emerged, not just once but several times. Looking back in the geological history, there have been several mass exterminations, all open to conjecture as to why. But always, without exception, bacteria continued to survive. If there is anything to evolutionary theory beyond a method of understanding, then bacteria are the source from which all life emerges.
...

Actually Juan, that makes sense. If one cares to look at the gestation period of a Human being, we find some interesting discoveries. As an embyro of less than one hundred cells (and we do start out with one or two cells), a human life form can be frozen, indefinitely, yet still survive thawing, to eventually become fully Human. Wherein a fully developed Human can not be frozen, thawed and resume daily life.

The gestation period of a Human being seems to go through every stage of "evolution" as suggested by theororists. Single cell, colony of cells, to protoform, wherein the heart goes from one chamber to two, to three to four, (does not a human fetus show vestigial gills at one point?). Limbs are webbed, then the webbing declines as the digits protrude further (but not always). I can see how evolution for "vertabraes" could logically be explained. But what about invertabraes? That is a game all its own.

And there are many more of them than there are of us...

just thinking...

v/r

Q

[path_of_one]

For anyone interested in more information/details about natural selection and skin color in humans- the site below is an excellent reference and it isn't too long and filled with jargon.

http://anthro.palomar.edu/adapt/adapt_4.htm

[juantoo3]

Kindest Regards, Path of One!

Thank you very much for the link! It was informative, although I still have the same reservations I noted earlier regarding daylight hours and such. I have thought a bit about the intensity of the sunlight striking the surface, seems it would be around 90 degree angle about the equator through the tropics of Capricorn and Cancer. But the atmosphere acts as a fluid, and the rotation of the planet causes it to be thickest about the equator and thinnest at the poles. So during the "summer" months towards the poles with extended daylight and thinner atmosphere, I am still inclined to think there would be a great deal of exposure to solar radiation. The plus being that there is reprieve during the winter months.

How this all figures into prehistoric human development is interesting, but wide open to conjecture.

[juantoo3]

Kindest Regards, Q!

Originally Posted by Quahom1

The gestation period of a Human being seems to go through every stage of "evolution" as suggested by theororists. Single cell, colony of cells, to protoform, wherein the heart goes from one chamber to two, to three to four, (does not a human fetus show vestigial gills at one point?). Limbs are webbed, then the webbing declines as the digits protrude further (but not always). I can see how evolution for "vertabraes" could logically be explained. But what about invertabraes? That is a game all its own.

Yes indeed! The other thread pointed out to me about something called "lanugo hair" that covers mammals just before to just after birth, humans included. (rarely, it doesn't go away, and you end up with the occasional boy born with a full beard!)

All mammals to my understanding go through a distinct series in their gestation. If I recall correctly from my human biology class a while back, there is even a period when a human fetus very much resembles a pig. It is only as the fetus continues developing that it takes on the final form it is born with.

Oh, before I go, I wanted to add the reason I noted the bacteria around volcanic vents on the seafloor and those found underground in oil and water deposits. We are familiar with the terrestrial types of single-celled creatures, at least from school books. You know, the ones that say the sun is the source of all energy. Yet these creatures exist without the benefit of sunlight. No need for chlorophyll. The sea-vent bacteria get their energy from the heat and nutrients (I believe sulphur compounds) released by the volcanic action. The subterranean bacteria are yet a mystery, I have heard no explanation of their source of energy. And they are perhaps the most numerous of all creatures, outnumbering all other life combined by a wide margin.