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Mcb 3020 Exam One Study Guide Questions And Answers
MCB 3020 Exam ONE 
 
hat is the role of microbes in maintain temperature on earth? (Role of microbes in CO2 and CH4 recycling) - Answer- CO2 and CH4 are greenhouses gases that are produced by microbes (organic carbon into CO2 and CH4 and vice versa) 
-> microbes control the temperature 
-> these gases trap infared light, and warm up the planet. 
 
List the top three causes of death in the US. - Answer- 1. Heart Diseases 
2. Cancer 
3. Stroke 
 
How has the role of microbes changed over t...