Yes plants can live in anoxic soil. an example of a plant that can live in anoxic soil is the mangrove. A mangrove can live in anoxic soil because of little arial roots called pnuematophores that are not submerged by water during the day, this allows them to draw oxygen into the underground root system.

Not completely, but enough to kill any plants or animals that live in it.

Anoxic.

A hypoxic or anoxic zone

Fred Pearce states that the Black Sea "has been lifeless for thousands of years" This is not true: the upper levels of the Black Sea have lots of aquatic life. It is only the lower level which is anoxic.