Chapter 7.10: Evolution of Metabolism

Question 1

After • Nitrogen Fixation Provided New Organic Nitrogen what is the last step in the evolution of metabolism?

Answer 1

• Aerobic Respiration Utilized Oxygen

Question 2

After • Anoxygenic Photosynthesis Allowed the Capture of Light Energy what is the next step in the evolution of metabolism?

Answer 2

• Oxygen-Forming Photosynthesis Used a Different Source of Hydrogen o Employs H₂O instead of H₂S

Question 3

After • The Evolution of Glycolysis Also Occurred Early what is the next step in the evolution of metabolism?

Answer 3

• Anoxygenic Photosynthesis Allowed the Capture of Light Energy

Question 4

What is the first step in the evolution of metabolism?

Answer 4

• The Earliest Life-Forms Degraded Carbon-Based Molecules Present in the Environment

Question 5

After • The Earliest Life-Forms Degraded Carbon-Based Molecules Present in the Environment what is the next step in the evolution of metabolism?

Answer 5

• The Evolution of Glycolysis Also Occurred Early

Question 6

After • Oxygen-Forming Photosynthesis Used a Different Source of Hydrogen what is the next step in the evolution of metabolism?

Answer 6

• Nitrogen Fixation Provided New Organic Nitrogen