Adventitious roots may form in external tissue as well as on existing roots.
Mammary ducts and false milk cavities may form in the tissue.
Abscesses may form in the kidney tissue, and some of the nephron tubules (urine-producing structures) may be destroyed.
New titanite, distinguishable on the basis of colour, may form in the same rock, while older, partly reset titanite is still present.
In some violent tornadoes, secondary vortices may form in the annulus, giving rise to what is termed a multiple-vortex tornado.
At maturity, or in the fall, round black specks, which are sexual fruiting bodies, or cleistothecia, may form in the mildew.
In certain conditions, such as congenital heart disease, blood clots (thrombi) may form in the pulmonary artery, and these may break loose.
For example, while water may drain from existing tundra lakes through thawed ground, other ponds and lakes may form in thawed spots where the surface sinks, creating more aquatic habitat.
Radar evidence also suggests that showers in temperate latitudes may sometimes be initiated by the coalescence of waterdrops, although the clouds may later reach heights at which ice crystals may form in their upper parts.
Similarly, desires and aversions may form in two ways.
It is further suggested that a metastable endo-addition pattern may form in such experimental conditions.
