But, as technology evolved, the determination of man to slip his earthbound shackles became less an inchoate religious yearning and more a plausible reality: it is difficult to tell whether the Chinese legend of the emperor Shun, who, in 2230 B.C., is said to have used a pair of conical reed hats to parachute to safety from the top of a burning granary, is folklore or history.
Key questions in analytical biology and biochemistry evolve around the determination of three basic molecular properties: size, weight and position.
Despite growing knowledge on how sex determination mechanisms can evolve, the evolutionary drivers of these mechanisms are understood less well [ 4, 7, 8].
Short secreted peptides such as Meg typically evolve very rapidly, making the determination of precise phylogenetic relationships across large timescales difficult.
The origin of the majority of genes that have conserved roles in eumetazoan gastrulation and germ layer determination evolved after the divergence of demosponge and eumetazoan lineages (for example, Fkh, Twist, Snail), giving credence to this supposition.
Optimistic and receptive, Toop sees an astonishing level of "vitality, evolving ingenuity and determination" in the ways in which musicians respond to technology but he also notes what has gone awry.
Remarkably, these genes are clustered on the sex chromosome, suggesting that short lifespan might have co-evolved with sex determination.
12. Evidence shows that rearrangement mutation and point mutation are not random but affected by DNA sequence and structure, and that the determination of mutation is evolving, in accord with the theory proposed here.
In the case of feminization, suppressor alleles have evolved and the intragenomic conflict has profoundly affected the sex-determination system in the woodlouse Armadillidium vulgare [ 16].
The determination of EGP by tracer methods has evolved over the half century since first introduced (39).
Today, science has evolved to the mapping of gene families, and to the systematic determination of the interactions between gene products.
