Recent content by BillTre

Too crowded in the middle. Seems like a good way to determine optimal spacing.

Bacteria can be seen in a light microscope, but viruses can not because they are too small to resolve optically. Smaller things are scientifically visualized using different technologies like electron microscopy or atomic force microscopy. Eyes don't do these things and can't see the really...

To get more information about one's environment (in a tradeoff with the costs to the organism for getting that capability). In a SWOT (Strengths, Weaknesses, Opportunities, Threats) analysis, its an opportunity. Vision gives rapid warnings of distant threats and alerts to distant opportunities.

There are probably many many different overlapping controls on cells size. The differences in cell size your question refers to are differences among different cell types. Their size has been selected for whatever purpose was adaptive to the organisms. There are probably a lot of different...

Tumble weeds a tumbling:

The sheep butted the robot thing over before the dog got to it: