If H5N1 viruses continue to evolve and acquire the ability to cause widespread human-to-human transmission, this could result in an influenza pandemic.
Evolving from a common GPCR ancestor through the subsequent mutation of neighboring AA residues, GPCR binding cavities have diversified and acquired the ability of selectively recognizing specific ligands.
Furthermore, genes involved in the SAR and in the activation of innate immune responses [29] were not expressed on plants infected with TEV-At17 while they were over-expressed on plants infected with the ancestral TEV, suggesting that the evolved virus acquired the ability to evade certain plant defense mechanisms, perhaps explaining the observed increase of viral load.
The modification of such a fold to acquire the ability to bind the heme group and exploit it evolved probably only in one evolutionary event.
From the 1950s to the early 1980s it was thought that tetrapods evolved from fish that had already acquired the ability to crawl on land, possibly in order to go from a pool that was drying out to one that was deeper.
To understand the simultaneous emergence of this pathogen, it is necessary to deduce whether these multiple lineages co-instantaneously acquired the ability to colonize chicken reproductive tissues or a single clone that possessed this ability evolved into multiple lineages before the pandemic.
A Y chromosome can evolve when a gene on a chromosome acquires the ability to determine the male sex.
Flexibility -- the ability to change, evolve, and adapt in the face of disaster.
Perhaps, therefore, the body had the ability to instantly evolve an antagonist when needed.
Thus, the gene encoding ConII has evolved in an accelerated manner from the ancestral gene to acquire the ability specific to pathogenic marine bacteria via the recognition of α2,3-sialyl galactose [ 20, 23].
The ability to bioluminesce has evolved many times.
