8) Why are cyanobac teria important, and what biochemical process is associated

Question

8) Why are cyanobac teria important, and what biochemical process is associated with this importance? (3 pts) 9) Describe the term "endosymbiosis" and its role in the evolution of eukaryotic cells (2 points). Which two cellular organelles support the notion of endosymbiosis (2 points) and how (1 point)? 10) What is the oldest fossil that shows evidence of sexual reproduction (2 points)? What is the importance of sexual reproduction (why is it advantageous) in the evolution of life orn Earth (2 points)? 11) When did complex multicellular organisms (animals) first evolve (2 points) and what type of biochemical evidence is this estimate supported by (2 points)? Later, what happened geochemically on the Earth that is associated with the increase in animal diversification (2 points)?

Explanation / Answer

8) Cyanobacteria is important because it forms   oxygen atmosphere on the earth.

They are most important to global C and N budgets.They are important in the formation of Proterozoic oil deposits .

The biological process associated with Cyanobacteria is Nitrogen fixation.Cyanobacteria capture and convert nitrogen in the atmosphere into useful organic nitrates.

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