This indicates that a process of symbiont acquisition (or replacement) in which a slowly-evolving progenitor gives rise to more rapidly evolving symbiotic descendants is expected to yield a tree with a comb-like topology that has little statistical support.
The second reason is that we observed stronger support for basal Rhabdocoela when analyzing the slowly evolving genes (Q1 and Q2); the more rapidly evolving genes support an association of Rhabdocoela and Tricladida/Bothrioplanida/Neodermata (Q3) or Rhabdocoela and Tricladida/Neodermata (Q4).
Matter is continuously fed from the more rapidly evolving star to the less massive one, which still remains on the main sequence.
The sharp rhythmic figures that begin each movement of "You Are" may sound familiar, and their insistent repetition beneath the more slowly moving (but more rapidly evolving) choral lines may seem almost brutally mechanistic.
It's clear that these differences are due to gene loss, because the more rapidly evolving R. prowazekii contains remnants of 229 genes found in R. conorii, and the arrangement of this "junk" DNA mirrors the configuration of active genes in R. conorii.
Dr. Mandelker explains, from Ra, that humans were created somewhat frail in physical strength and constitution so as to encourage interdependence and social formation, thus potentially helping one another and thus more rapidly evolving in consciousness and potential.
Erylusp sp. which has lost its aspidasters was part of the E.p mamillaris/discophorus complex, but more rapidly evolving markers are required to fully understand this group.
The analysis of slowly evolving canSNPs allowed the definition of major clonal lineages in B. anthracis, whereas the more rapidly evolving MLVA15 markers elucidated younger population-level structure in the species.
The slowly evolving canSNP data set was then coupled to the more rapidly evolving MLVA15 marker set to greatly enhance the resolution beyond the original 89 B. anthracis genotypes [4].
Germ cell-expressed genes and somatic cell-expressed genes evolve at different rates, and we speculate that the greater conservation of somatic factors would require a correspondingly greater conservation of target sites whereas more rapidly evolving germ cell factors might coevolve with rapidly changing regulatory sites.
The relationship between the three Stygiocaris species is not clear in the two 16S datasets (Figs. 4, 6), and so we also sequenced representatives of the major intraspecific groupings within each of the three species for the conserved nuclear H3 gene and the more rapidly evolving mitochondrial COI gene.
