will occupy the latice points that define the face centered cubic unit cell, with the zinc ions occupying the tetrahedral holes. Since there are four sulfide ions (FCC), we need only four zinc ions to ...

Multiple cell types can then join together to form tissues, such as muscle, blood, and brain tissue. In single-celled organisms, signaling allows populations of cells to coordinate with one ...

Cells can replicate themselves. The ability to reproduce is part of what defines cells as living things. This single characteristic also helps explain many other phenomena of life as we know it ...