These amœboid bodies develop by stages, in which an undulating membrane and a flagellum appear and the protoplasm gradually approaches the mature form, or they again undergo segmentation into a number of smaller amœboids, which go through a similar process of development and finally arrive at the mature flagellate organism.

Newly promoted, they were top of the First Division and unbeaten when they took on a Manchester United side that had been revitalized by a new manager,[…].

The yellow fog that rubs its back upon the window-panes, / The yellow smoke that rubs its muzzle on the window-panes,

Men often work in unison to accomplish political or religious reforms. This is coöperative effort of one kind.