Question

like modern organisms, the earths early organisms also needed to break down glucose to generate the energy required for survival. which process did they most likely use? o photosynthesis o aerobic respiration o anaerobic respiration

Explanation:

Early Earth had low - oxygen levels. Photosynthesis produces glucose rather than breaks it down for energy. Aerobic respiration requires oxygen which was scarce. Anaerobic respiration can break down glucose without oxygen, making it the most likely process for early organisms.

Answer:

C. anaerobic respiration