Here is one of the papers, and yes Pixy, I have read it, understood it, debated it and discussed it great length long before I posted here.
Have you?
http://www.cell.com/current-biology/abstract/S0960-9822(03)00872-8
What are genes for complex and even human nerve function doing in this simple coral?
If you bother to read the full paper and not merely the abstract, that gets explained.
For example, the A. millepora EST dataset contains homologs of many bilaterian genes whose specialized functions are associated with highly differentiated nervous systems. These include genes with vertebrate, but no known invertebrate, counterparts; e.g., those that encode photoreceptor all-trans-retinol dehydrogenase (AmEP00301), Churchill, and Tumorhead. They also include more generally conserved homologs of genes that encode Frequenin, Homer 2d, Glia maturation factor b, and Notch pathway components. This complexity is particularly surprising given the morphological simplicity of the coral nervous system (anthozoans have the simplest extant nervous systems—morphologically homogeneous nerve nets) and the absence of recognizable photoreceptors. Nevertheless, coral larvae display phototactic behavior [30] and the Pax-6-related gene PaxC is expressed in a subset of A. millepora presumed neurons [31]. The detection of ESTs matching hex and snail, genes that play key roles in endoderm and mesoderm patterning in triploblastic animals, supports the renewed interest in the nature of the cnidarian primary tissue layers [12]. At the very least, these findings provide a strong argument for developing a much better understanding of cnidarian developmental mechanisms, if we are to understand the origins of these mechanisms.
In other words, the coral
actually uses a number of these "vertebrate nervous system" genes, and the paper's authors suggest that a closer look at the coral's other tissues and developmental mechanisms to find where and how these other genes get expressed, since that will give scientists a much better understanding of how the coral develops and operates.
Note the researchers were "shocked", "surprised",
Those were actually the words of the reporter, not the researchers. But that's actually irrelevant.
etc,.....This is not what NeoDarwinism predicts.
No, they weren't "shocked" because "NeoDarwinism" didn't predict it. They had previously assumed certain genes had arisen after invertebrates and vertebrates diverged, rather than before, because the intermediate invertebrates did not possess those vertebrate genes.
But since
nothing inherent in "NeoDarwinism" says that early organisms MUST HAVE BEEN simpler than modern organisms. They usually are, yes, but not always. And while scientists had previously assumed the ancestor metazoan was simpler based on invertebrate evolution vs. vertebrate evolution, the fact that this new evidence changes that assumption doesn't affect anything about the way evolution works or is presumed to work.
In fact, the paper's writers point out that in their conclusion, saying "These data are a provocative reminder of the limited extent of our understanding of metazoan genome evolution and the potential hazards associated with extrapolating general evolutionary principles based on the model invertebrates." In other words, "we
shouldn't have assumed the ancestor metazoan was a simple organism based simply on what modern metazoans are like, because evolution doesn't mandate that early = simpler."
Since the coral has no vertebrate nerve function, natural selection could not have been involved in selecting for vertebrate nerve function and the genes corresponding to that.
How did the genes get there?
The ancestor metazoan evolved them, using them in a fashion presumably very much like the way
A. millepora currently uses them. As vertebrates evolved, they took those particular genes and developed them further into the modern vertebrate nervous system. Other invertebrates (like
D. melanogaster and
C. elegans) found that they didn't use and therefore need those genes, and so evolved them out from their genome.
But, as the paper notes, not all invertebrates lost those genes during the long evolutionary journey:
Comparisons with the urochordate Ciona [19] emphasize the derived position of the model invertebrates and, although only limited comparative data are available for representatives of the more basal insect orders, these often also dramatically support the derived position of D. melanogaster. For example, although D. melanogaster does not carry out standard CpG methylation and lacks typical MBD proteins [27], more primitive insects such as the cricket Acheta are more vertebrate-like in both respects (see Figure 2C; [28]). Similarly, comparisons of retinoic acid receptor ligand binding domains (RXR LBDs) indicate that tick, crab, and grasshopper (Locusta migratoria) sequences are more similar to their vertebrate orthologs than to the D. melanogaster LBD or those of other holometabolous insects [29].
Yes, it does. So does the paper I linked to.
Can you quote the sentence in the paper where it does that, please?
You need to read the original paper and some other work to understand why they don't think that's the case.
You're right that they don't think that's the case. But the reason they give for it contradicts what you claim about it. dlorde explained exactly that to you way back in
post 206!
He stated that the creatures that gave rise to plants and animals have more types of genes than are available today. When you think of that, it is quite an amazing comment which completely upends the NeoDarwinian narrative.
It does no such thing. And, as I noted above, the paper's authors use that to
warn against making that very assumption you're making (and, bizarrely, that you think the evolutionary narrative actually depends on, when it doesn't).
And that's even setting aside the fallacy of thinking that "more complex than we thought" means "more complex than modern species" (because that's irrelevant to your complete misunderstanding of what this paper both says and implies).
Instead of novel genes emerging with the adaption of through mutations of beneficial traits, which is the basic NeoDarwinian narrative, this guy is saying the genes were all there before there were even plants and animals.
That's quite an astonishing statement.
It certainly would be, if that were the statement being made. But the paper and the paper's authors are saying no such thing.
Early analogues of
some genes found in vertebrates are found and
used in a modern coral but aren't in other invertebrates, which suggests that those particular genes evolved in the common ancestor organism.
But neither the ancestor metazoan nor the modern coral has the genetic code for the modern human nervous system or anything
close to it, merely genes for small parts of it. A whole
hell of a lot of "novel genes" were required to get from what that ancestral metazoan possessed to the nervous system that you and I possess.