Scientists recently discovered a species of bacteria that's capable of photosynthesis, but it's anaerobic and doesn't produce or use oxygen for respiration. Which process will be absent in this organism?

A. Calvin cycle

B. electron transport system

C. glycolysis

D. Krebs cycle

Anaerobic bacteria: Bacteria which does not use oxygen or in the absence of oxygen.

electron transport system is absent in photosynthetic anaerobic bacteria.

since, glycolysis, krebs cycle are essential metabolic pathways in order to produce energy and calvin cycle is essential for the photosynthesis process.