35. The nitrogen-fixing activity of cyanobacteria takes place in (A) chloroplast (B) thylakoid (C) cell envelope (D) heterocyte

36. What is the difference between the cell walls of Bacteria and Archaea? (A) Archaea are without cell walls. (B) Bacterial cell walls contain peptidoglycan, but cell walls of Archaea lack peptidoglycan. (C) Archaea have simpler walls, while bacteria have a cell wall and an outer membrane. (D) Archaea have complex cell walls, while bacteria lack peptidoglycan.