Does anyone know anything about the volvox (microscopic creature)?

Question

Like, how do they breathe, how they can sense things so they don't bump into them, how do they grow, etc.

Answer 1

http://www.microscopy-uk.org.uk/mag/inde...

Answer 2

Stick out to this site

http://en.wikipedia.org/wiki/Volvox

Answer 3

I don't but there are many online sources that do!

The second link has much detail!