Sasai reasoned that the petri dish was constraining the stem cells and preventing their developmental mechanisms from playing out, and he set about devising a "floating" cell culture system.
The focus here is on investigating the underlying developmental mechanisms that lead to the occurrence of the behaviour.
Evolutionary developmental mechanisms may be genetic, cellular, developmental, physiological, hormonal, or any combination of these.
Might they be due to historical holdover, genetic linkage, or developmental mechanisms (e.g., canalization)?
But those developmental mechanisms must be passed down from parent to offspring, via genealogical relations.
Jurassic fossils show that ecological diversification and the developmental mechanisms behind it occurred in early mammals.
More precisely, embryonic zebras have developmental mechanisms that cause zebras to have stripes.
The zebrafish (Danio rerio) is an exquisite vertebrate model system for the study of developmental mechanisms.
Developmental mechanisms are usually assumed to evolve by natural selection of the morphological traits they produce.
This leaves no choice for the evolution but to change the developmental mechanisms.
Different patterns of QHB expression are found between the radicle and crown roots, suggesting differences in their developmental mechanisms.
