what makes cyanobacteria distinct form its neighbors in the tree of life

What makes cyanobacteria distinct form its neighbors in the tree of life? How have cyanobacteria contributed to the ability of other organisms to photosynthesize? Hint: mitochondria, the powerhouse of the eukaryotic cell went through a similar process.

2. Phytoplankton photosynthesize and are known as primary producers. What is the approximate amount of oxygen in the earth’s atmosphere that is produced by phytoplankton? Does this blow your mind :)?

3. Why is the nitrogen cycle important to life on earth?

please answer each question using 3-5 sentences. Please cite any source material a well.

 
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