Cyanobacteria have photosynthesis and are the only bacteria.

The answer is water and the only oxygen-producing bacteria. This cyanobacterium is also known as Cyanophyta, are a phylum of bacteria that acquire their energy through photosynthesis, and are the only photosynthetic prokaryotes able to provide oxygen.  In oxygenic photosynthesis, water is the electron donor. 

hi,

the answer is third world countries, take for instance china, they restricted each family with only one child,

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answer; the correct answer is desert plants;