Unlike purple and green phototrophic bacteria, cyanobacteria
a. produce oxygen during photosynthesis.
b. do not require light.
c. use H₂S as an electron donor.
d. have a membrane-enclosed nucleus.
e. all of the above

The metabolic process photosynthesis occurs in which part of the bacterial cell?

Choose the correct definition of oxygenic photosynthesis:

Oxygen produced during oxygenic photosynthesis comes directly from:

Which of these answers illustrates a major difference between oxygenic and anoxygenic photosynthesis?

Why do cyanobacteria and algae take in carbon dioxide and give off oxygen?

Microbes that reduce N2 to NH3 engage in nitrogen ___________ .

Chemolithotrophs acquire electrons from (organic/inorganic)___________ compounds.

Photosynthetic bacteria that also fix nitrogen are __________ .

a. mycoplasmas

b. spirilla

c. bacteroids

d. cyanobacteria