From the developing Drosophila compound eye, a wave of pattern development and cell-variety determination sweeps over the presumptive eye epithelium. This 'morphogenetic furrow' coordinates the epithelial cells' division cycle, condition and gene expression to make evenly spaced neural cell clusters which will at some point type the Grownup ommatidia. As http://cnc-machine-for-sale02963.bloginder.com/14969181/a-secret-weapon-for-5-axis-cnc-center-quaser-mf-630