Sure enough, when the duo got together to examine notochords under the microscope, they saw cells containing nuclei just like those ... after he’d seen tiny rectangular shapes while studying slices of ...

YEAST CELLS — Brewing yeast cells are seen under a microscope as part of a study on nonalcoholic beer. Credit must be given to the creator. Only noncommercial uses of the work are permitted.

The first cell observed under a microscope, back in the mid-1660s by physicist Robert Hooke, was a plant cell in a slice of cork. Botanist Robert Brown first named the nucleus after observing opaque ...