I am interested in the common brown ticks found on pets. The ticks are unusally good at surviving on these animals, even if they are shaken/thrown off, tramped upon, without nutrition (blood) etc. I would like to know how their genes could have evolved to such a high level of survival. Steve.

..., supporting the geographic mosaic theory of co-evolution. The form of this variation is not, however, universal. Details of infectivity are pivotal: in T7-E. coli with a modified gene-for-gene interaction, diversity is low at high resource input, whereas, for matching-allele interactions, maximal diversity is found at high resource input. A combination of in vitro systems and appropriately ...

...-cellular creature, it contains signature sequences for gene regulation found in more complex animals and humans...size of those found in most animals with genes, introns and spacer sequences like the most ... flies and worms, even the arrangement of genes is conserved between the Trichoplax and human ... "Trichoplax shares over 80 percent of its genes with humans," said Dellaporta. "We are exited ...

... so stable that it was able to use the forced energy for work and development and further stability in that environment. 4. Not individual genomes, but one single genetic pool whose member genes through trial and error, help stabilize the entire genome. 5. No fluke origin of species, moments. But instead an obvious continual reaction to the environment that forces a 'selection' throughout ...

... how this universal machinery changes from one organism to another," Luthey-Schulten said. "In that the ribosome constitutes the core of the cellular translation mechanism, which is the sine qua non of gene expression, which is the essence of life as we know it, these findings constitute a major step in understanding the evolution of life, which is still a journey of a thousand miles," ...

...:-) However, there is one possible pitfall with using your logical method of countering the conventionally artificial (and if not completely kaput so both inEPT and un-Edserian ;>) algebraic accounting for genes that give groups that have them the advantage over those that don't. That is: If one gets too absorbed in poinitng out the wrongness of relative fitness one may automatically...

...@aol.com> wrote in message news:g5o1p1$kff$1@darwin.ediacara.org... Sympatric Speciation or Speciation without Changes in Genes <snip> Are changes in genes or in allele frequencies necessary for speciation to occur? In depth discussion of the issue can be found in the website http://www....

CNCa...@aol.com wrote: Sympatric Speciation or Speciation without Changes in Genes Sympatric speciation is not speciation without changes in genes. -- __________ |im |yler http://timtyler.org/ tim@tt1lock.org Remove lock to reply.

Sympatric Speciation or Speciation without Changes in Genes For a long time, sympatric speciation has been considered as... been considered to require accumulation of differences in the gene pools of two populations which under panmictic conditions in ...individuals for specific. No genetic differences exist in genes (including genes responsible for pheromonal components) and mitochondrial DNA of...

Researchers find new mode of gene regulation in mammals Researchers at the...found the ribozyme embedded within certain genes in mice, rats, horses, platypuses, ... effectively turns of f the genes by preventing protein translation. Presumably,... and that the ribozyme decreases gene activity in mammalian cells. "This ... sequence in the corresponding human genes, however, suggesting that a different ...