Abstract: The theme and variation music form is a hierarchical structure in music. It has a theme segment at the beginning, followed by a series of variation segments imitating the theme segment.

Extensive genetic variation has been documented throughout the range of the Two-lined salamander (Eurycea bislineata) species complex; however, a lack of finescale studies across putative species ...

Some homokaryotic isolates of Verticillium albo-atrum (microsclerotial form) vary radically in colony appearance even when temperature, lighting, humidity and medium content are held constant. This ...

‘As an evolutionary geneticist, I encourage developmental botanists to look into the genetic basis of the cushion form in stemless daisies’ Composites, or plants in the family Compositae, usually look ...

Callitriche intermedia shows a well-marked variation in its leaf form, dependent on whether the crown of the plant is submerged or floating at the surface of the water. When the crown is submerged, ...