Question

which type of bacteria photosynthesize using chlorophyll a, produced the oxygen of earths early atmosphere, and contain photosynthetic lamellae? spirochetes gram - negative, rod - shaped bacteria cyanobacteria chlamydias actinobacteria

Explanation:

Cyanobacteria are photosynthetic bacteria that use chlorophyll a for photosynthesis and were crucial in producing the oxygen of Earth's early atmosphere. They contain photosynthetic lamellae. Actinobacteria are not primarily photosynthetic in this context. Chlamydias are obligate - intracellular parasites and not photosynthetic. Gram - negative, rod - shaped bacteria is a general category and not all in this category are photosynthetic. Spirochetes are not known for this type of oxygen - producing photosynthesis.

Answer:

C. Cyanobacteria