Nevertheless the higher rate of adaptation in the young genes might be consistent with the ideas that lineage-specific genes may drive morphological specification, enabling organisms to adapt to changing conditions (Khalturin et al. 2009) and also with the observation that young genes tend to be less functionally important.
We tentatively propose that the level of morphological specification is a product of languages adapting to the learning constraints and the unique communicative needs of the speaker population.
In Text S10 we formalize this intuition as a mathematical model and derive a linguistic learnability (fitness) landscape for languages over varying levels of morphological specification and proportions of adult learners.
It would be difficult to reconcile this morphological specification with the structural requirement for protection, which is the tight sealing of the valves.
A strong influence of genotypes at MTHFR c.677C>T and c.1298A > C on the morphological specification of primary varicose veins and progression towards complicated disease is suggested.
Both polymorphisms of MTHFR may be involved in the morphological specification of primary varicose veins and contribute to the development of complicated disease.
Although the way a lexicon is organized depends on what it is designed to do, it is minimally necessary for it to have formal (phonological and graphological), morphosyntactic (lexical and morphological (sub categorization), and semantic specifications.
Breast cancer prognosis is influenced by many factors such as morphological and pathological tumor specifications and biological tumor markers.
As in our previous study, we obtained very good contrast and morphological delineation, within the specification of a 5- μm spatial resolution, using transgenic expression of YFP in motor neurons.
Both of these morphological transitions involve cell-type specification, and thus the adoption of specific molecular identities by large subsets of cells in the population (reviewed in [ 19]).
