A cell's daily operations are accomplished through the biochemical reactions that take place within the cell. Reactions are turned on and off or sped up and slowed down according to the cell's ...

In 1885, Hans Driesch showed that both cells of a two-cell sea urchin embryo are able to develop into a complete sea urchin, demonstrating the totipotency of these cells. Pluripotency of vertebrates ...

A solar cell is made of two types of semiconductors, called p-type and n-type silicon. The p-type silicon is produced by adding atoms—such as boron or gallium—that have one less electron in their ...