Together, the total area of a cell's internal membranes far exceeds that of its plasma membrane ... An electron micrograph therefore provides an excellent blueprint of a cell's inner structures.

A car can move, it gets energy from petrol (like nutrition and respiration), it might have a car alarm (sensitivity), and it gets rid of waste gases through its exhaust pipe (excretion).

have a geodesic outer coating that eventually pops through the side of the cell and releases its chemical message to be detected by the cell’s neighbors. Image produced by John Heuser ...

It bonds with its silicon neighbor atoms, but one electron is not involved in bonding. Instead, it is free to move inside the silicon structure. A solar cell consists of a layer of p-type silicon ...