Which microbe(s) are responsible for photosynthesis in an aqueous environment?

Question

A) Protozoa
B) Algae
C) Cyanobacteria
D) Bacteria in general
E) Both B and C

Answer 1

Do your own homework. How can you (or your textbook) not know this?

Nice of you to stop people e-mailing you.
I resent your commments about my answer. One assumes that you doing this for a class, and as such you should have had lectures on this sort of topic. If not, then text books at least will tell you the answer. If all else fails, try deductive reasoning. Not all Bacteria are photosynthetic, therefore D is out. The same goes for Protozoa; A is out.

That leaves B and C.

Cyanobacteria, if you know your latin (i believe its latin and not greek), then you will know that cyanobacteria use sulphur. Therefore the answer has to be B, Algae.

It would appear, contray to your e-mail that I am more educated than you, so keep future comments like that to yourself.