The advantages and disadvantages of aerobic respiration

Discuss the advantages and disadvantages of aerobic respiration, anaerobic respiration, and fermentation. Part 2: Discuss the roles of secondary metabolites in biology. Such compounds have a wide variety of practical applications. If you were going to start a biotechnology company that produced secondary metabolites for sale, which type(s) would you focus on? How might you go about discovering new secondary metabolites that could be profitable?