The full story
Here is the visual story of egg growing to larva to pupa and then to adult bee, all wrapped up in one extraordinary minute by the wizards at National Geographic (complete with the appearance of a less-than-welcome visitor).
Cleanup and reuse
And then the cell has done its job…but not really!
Cells are re-used over and over by the colony. It takes a tremendous amount of energy to create a cell, so it is much more effective to reuse existing cells than build new ones.