Some of the greatest features in Photoshop are the text, object, and image effects such as Textures, Patterns, Gradients, and Styles. Styles are those amazing special effects that you see rolling ...

Decapentaplegic (DPP) exerts its long-range influence on wing patterning by acting 'directly' at a distance as a gradient morphogen, rather than 'indirectly' as a short-range inducer of other signals.