Perhaps I am confused as to whether you mean molecular or cellular complexity?
don't feel bad.
i've seen threads go on page after page arguing what complexity is, even smith in the referenced paper has questions about it.
i ran across a very good definition the other day, a month ago i guess, but i don't think i saved the page it was on.
even if i did save it, it would be hard to find it because i don't have a directory structure for my evolution folder.
i have well over 200 megabytes of web pages and PDFs in my folder, have any idea how many items that is?
anyway, this definition was on the gene scale and mentioned something about the ability to code for an increasing number of proteins.
the more proteins it could code for, the more complex it was.
it might seem obvious to biologists, but i now understand why bacteria is considered more complex than humans.
bacteria contains very little, if any, non coding sequences.
Let us be clear:
https://en.wikipedia.org/wiki/Gene
So if it does not code it is not a gene, it is non-coding DNA. If it is not expressed phenotypically, it is not rally a gene. I will try to be more precise in future.
yes, please.
The presence of long strings of non-coding DNA in unrelated lineages is evidence of HGT or retro-viral insertions.
hmmm . . .
okay, i reluctantly agree, but i have doubts.
the above might be an explanation for sequences, but not for a single gene event.
then again, a single base pair change, which could be a mutation, can change an entire sequence.
your hypothesis is questionable.
In science, a fact is an observation. A hypothesis is a testable explanation of facts. A theory is a body of well-tested and un-falsified hypotheses.
a hypothesis must also be able to be falsified in order to be a valid hypothesis.
this is one of the reasons creationism creeps into debates such as this, and please don't.
HGT is an observed mechanism that explains the identical sequences of non-coding DNA, DNA that cannot be expressed phenotypically or subject to selection.
If you have a better explanation for long sequences of non coding DNA in unrelated lineages than HGT or retro-viral insertion, then, trot it out.
like i said earlier, i'm not doubting it happens, but i do question how scientists actually knows this stuff happened so long ago.
a single base pair mutation can screw up an entire sequence, and a single gene can be easily seen as mutated instead of HGT.
gene duplication can also be a factor.