These cells allow the eye to see form, color, and detail.

These cells allow water movement until it reaches the Casparian strip, made of suberin, a waterproof substance.

These cells allow the user to reproduce actual conditions of the ITS-90 temperature scale.

To put the above simply, cells do not usually allow certain types of substances into their interior space.

In addition, building-integrated photovoltaic cells will allow the stadium to feed electricity to the grid.

Non-keratinized cells allow water to "stay" atop the structure.

These cells, synchronized in M phase and injected into the oocyte allow to get viable offspring.

These cells allow the adaptive immune system to mount faster and stronger attacks each time this pathogen is encountered.

A few cells however are living and allow the passage of water through them.

Detecting such cells could allow doctors to detect cancer early or to monitor the success of therapy.