All these findings suggest that the frontal gland of termite imagoes is by no means an ontogenetic by-product of the selected expression of the soldier frontal gland in imagoes, but rather an adaptive organ of probably great value, resulting from caste-specific selective pressures.
Evolution was perceived as having proceeded by an increase in complexity and an increase in the extent of ontogenetic change, by terminal addition.
In order to uncover the workings of endoreduplication in polysomatic species, our study examines flowers of T. pratense in three ontogenetic stages by means of flow cytometry.
The presence of ecologically and fisheries important species in either coral or macroalgal habitats, combined with inferences of ontogenetic shift by fish between these habitats, indicates that both habitats are essential and warrant protection.
Morphological features like the development of a facet margin as well as the position of the entepicondylar foramen, which were used as ontogenetic features by Sander [12] and Bickelmann and Sander [14], are not considered because they are not applicable to the current sample.
Therefore, the origins of muscle-enriched miRNAs can be related to an acquisition of new physiological and ontogenetic patterns by the gene expression regulatory machinery, which reflects in their constrained evolution [ 2, 31].
Signals derived by ontogenetic ritualization are one-way signals, and only by coincidence might one expect both participants to use an identical gesture for the same purpose to each other.
Clearly evolution cannot occur by transformation from one adult form to another adult form, but by ontogenetic change over time.
Their colouration is determined by ontogenetic colour changes during moulting.
Variation in AOC may also reflect early ontogenetic processes caused by maternal effects [54] [56].
A Triceratops ontogenetic series described by Horner and Goodwin [15], [16] revealed major ontogenetic modifications to cranial ornamentations on various parts of the skulls.
