Both types of threshold mechanism have been shown to couple horn growth with nutrition in scarab beetles and are considered facultative (polyphenic) regulatory processes, and preliminary evidence suggested that they might sometimes both be present in the same species.

The Phyſician now arrived, and began to enquire of the two Diſputants, how we all did above Stairs? 'In a miſerable Way,' anſwered Thwackum.

qualifying rounds of the championship

The concurrent loss of the characteristic of maturability and the phenotype of myeloid commitment suggests that the control of the two phenomena may be related.