Spatially coordinated apical constriction occurs during Drosophila salivary gland invagination, but the salivary gland can form fully internalized and elongated tubes even when this process is completely blocked.
Condensation and segregation of chromosomes during mitosis is caused by a combination of short-range interactions between nucleosomes and the long-range contraction of chromosome arms mediated by condensin.
Closure of the cranial neural tube, which is essential for mammalian development, is driven by spatially and temporally patterned cell remodeling events that require positionally regulated Sonic hedgehog signaling.
By driving the localized contraction of subcellular muscle regions, a single motor neuron reverses the flow of material in the Caenorhabditis elegans pharynx, a neuromuscular pump, converting feeding into spitting.
Spatially and temporally patterned activation of the small GTPase Rho1 indicates that ventral-specific factors contribute to cell- and tissue-level behaviors during ventral furrow formation, the first step in Drosophila gastrulation.