Multicells-Life Date Pushed Back
Multicells-Life Date Pushed Back,
But With Confused Scenario And Terminology
A. From “Animal ancestors may have survived ‘snowball Earth’” http://www.sciencenews.org/view/generic/id/40580/title/Animal_ancestors_may_have_survived_‘snowball_Earth’
Chemical fossils in Precambrian sedimentary rock push back the first date for animal life.
1) Finding a molecule that was made by an organism, means that the biosynthetic ability to make that molecule must have evolved earlier than the Cambrian period, which extended 544 to 500 million years ago with marine invertebrates. Biosynthetic ability had to be around by at least 635 million years ago and, the researchers say, maybe as early as 751 million years ago.
2) There’s evidence of eukaryotic life, organisms with DNA sequestered in a protective nucleus, from roughly 1.9 billion years ago, but proper multicellular animals don’t appear on the scene until much later.
B. Confused terminology
The report mostly and clearly attributes ONLY to multicells organisms the terms animal ancestors, animal life, organism, biosynthetic ability. Yet it terms also an ‘organism’ a maybe, probable, 1.9 billion yrs old ‘eukaryotic life’, even if implying that it might have not been ‘proper multicellular animals’.
C. Suggested clarification of the evolution scenario, and terminology
Per “Life’s Manifest”
http://www.the-scientist.com/community/posts/list/112.page#578
1. First were independent individual genes, Earth’s primal, 1st stratum, organisms.
2. Genes aggregated cooperatively, evolving into interdependent multigenes genomes, with each gene speciating with specific functionality(ies), genomes becoming 2nd stratum organisms.
3. Simultaneously genomes evolve protective and functional membranes, genomes’ organs.
4. Then followed cellular organisms, evolving further a variety of outer-cell membrane shapes and functionalities, 3rd stratum organisms, first monocelled and later multicelled organisms.
Genetic evolution is definitely driven by culture. Evolution of the multicelled organisms was preceded by the cultural evolution of cooperative communities of the monocelled organisms. Most presently observed biological signals, processes and internal organs in multicelled organisms have originated and evolved by and during the cultural evolution of cooperative communities of the monocelled organisms…
Suggesting,
Dov Henis
(Comments From The 22nd Century)
http://blog.360.yahoo.com/blog-P81pQcU1dLBbHgtjQjxG_Q–?cq=1
EVOLUTION Beyond Darwin 200
http://www.physforum.com/index.php?showtopic=14988&st=405&#entry396201
http://www.the-scientist.com/community/posts/list/100/122.page#1407