Monitor the final choice of each group, to ensure diversification within the class.
For example, some authorities consider Monogenea to be a subclass within the class Trematoda.
Another group of unusual forms, the lepospondylians, resembled amphibians but are not included within the class in most recent classifications.
Within the class, ecological diversity has resulted from adaptive specialization in food acquisition, habitat preferences, and locomotion.
But there is also a distinction to be made within the class of abilities itself.
Within the class of PFC chemicals, perfluorooctanoic acid and perfluorosulphonic acid are generally considered reference substances.
Phytoplasmas were assigned to a provisional genus, 'Candidatus Phytoplasma' within the class Mollicutes (IRPCM, 2004).
Among these, multi-frequency and chirp represent two optimal candidates within the class of frequency domain-based signals.
For example, variation within the class of those with normal color vision (see subsection 2.4 below), or variation within the class of standard illuminants (different kinds of daylight, say), can by themselves account for a difference in color appearance.
Since existence is a mode or reality for Wolff, existence is considered to fall within the class of compossible realities.
Moreover, the Carnegie conjecture applies both within the class of skilled families and within the class of unskilled families so that generations exerting effort are followed by generations that do not exert it.
