To use a light microscope to examine animal or plant cells. To make observations and draw scale diagrams of cells. Turn the coarse focus so that the stage is as close to the objective lens as ...

Yet, this is the goal of biology at the molecular level — to understand the collaborative functioning of the elements as being part of a system that forms a cell, a tissue, even an organism.

Scientists uncover how the nucleolus, a tiny structure within cells, may control aging and lifespan, opening new ...