razzelflabben said:
Now on to the subject of one living cell organisms, First, this is different from what we were taught,
Who's we, paleface? You may have been told that the common ancestor was a one-celled organism, but I can't see you being told it was a "one living cell organism". That makes no sense.
secondly, you state that we cannot state taht all life rose form a single living cell. Yet we have overwhelming evidence to say that they did?
We have overwhelming evidence for
1. Common ancestry.
2. The common ancestor was a one-celled organism.
However, you can't combine those to say that there was only
one one-celled organism. Do you see how the combination doesn't follow?
We have more problems with the theory when we try to figure out how these single cell organisms not only evolved into creatures, but how did they evolve into male and female?
That's not a problem. I'm afraid it is Argument from Ignorance. You have to remember that there is a differnce between what
you know and what is
known. The evolution of sex can be understood by looking at
living organisms that are intermediates in the process.
1. C Zimmer, The slime alternative. Discover 19: 86-93, 1998 (Sept) Amoeba Dictyostelium is single celled, but forms multicelled organism with differentiation when food supplies are low. Sexually reproduces sometimes, forms a cyst, and then asexually divides with the new genetic material. Also forms an eye of sorts from individual cells that act as lenses. Cells act and use same proteins as phagocytes in immune system.
2. DL Kirk Molecular-Genetic Origins of Multicellularity and Cellular Differentiation. Reviewed by G Bell in Development: Volvox. Science 282: 248, Oct. 9, 1998. Volvox (an algae) is a model system of multicellularity. Has fewer than 20 cells and only two types: soma and germ cells. Has single celled relatives, notably Chlamydomonas.
3. Evolution of Sex. Science 281: 1979-2010, Sept. 25, 1998. A series of 8 review articles discussing the topic.
3a.
http://www.nature.com/nrg/focus/evolsex/
Also do a search on "Volvox" on the web. Fascinating creatures. Have only two types of cells -- body cells and sex cells. No male and female but reproduce sexually.
What predictions can the TOE offer?
1. That all life can be classed in a nested hierarchy.
2. That not all species will be found in all layers of the fossil record.
3. That DNA sequences will not be independent observations but will be interrelated thru historical connections.
4. The characteristics of a hive mammal. Predicted
before the naked mole rat was discovered.
5. That, as we go back in time, lineages will become less and less distinct.
6. "For example, scorpionflies (Mecoptera) and true flies (Diptera) have enough similarities that entomologists consider them to be closely related. Scorpionflies have four wings of about the same size, and true flies have a large front pair of wings but the back pair is replaced by small club-shaped structures. If Diptera evolved from Mecoptera, as comparative anatomy suggests, scientists predicted that a fossil fly with four wings might be foundand in 1976 this is exactly what was discovered."
7. That you can treat AIDS by giving anti-viral drugs for a period of time, then remove them for a period, and then institute them again. And this is a successful way to keep HIV under control.
8. That guppies placed above falls so that predators can't get to them will evolve so that they are larger and mate later. 2. Reznick, DN, Shaw, FH, Rodd, FH, and Shaw, RG. Evaluationof the rate of evolution in natural populations of guppies (Poeciliareticulata). Science 275:1934-1937, 1997. The lay article isPredatory-free guppies take an evolutionary leap forward, pg 1880.