Therefore, it can be suggested that the four networks analysed here are sensitive to the perturbation of more highly connected hubs rather than removal of less connected nodes.
However, compared to the rest of the genome, forager-upregulated genes were much more highly connected and conserved, while nurse-upregulated genes were less connected and more evolutionarily labile.
Most strikingly, forager-upregulated genes were much more highly connected and correspondingly more conserved, while nurse-upregulated genes were less connected, and more rapidly evolving and less conserved.
Specific hub ('rich club') brain regions are more highly connected to each other, forming a selective network with higher connectivity than other brain regions (van den Heuvel and Sporns, 2011).
An interesting question is why the Mafia concentrates on construction when there are other sectors of the economy that are more highly connected within the network, such as retail and wholesale.
Thus Gopnik writes: "Babies' brains are actually more highly connected than adult brains; more neural pathways are available to babies than adults".
Most real networks typically contain parts in which the nodes (units) are more highly connected to each other than to the rest of the network.
This is further indicated by the higher centrality of these networks (Table 2), indicating more highly connected metabolites.
There are a few pairs of cancers which are more highly connected in the FDA cancer network than in the clinical trial cancer network (Table 4 and S3).
Under both light conditions the known stress responsive metabolites raffinose, putrescine, proline, galactinol, trehalose and GABA were more highly connected at 4°C than at 20°C, indicating coordinated stress responses of metabolism.
