Question

multiple choice question
in the light-dependent reactions of photosynthesis, how many photosystems do plants and algae use in series?
four
three
two
one

Explanation:

In the light - dependent reactions of photosynthesis, plants and algae use two photosystems (photosystem I and photosystem II) in series. The other options (four, three, one) do not match the scientific knowledge about the photosystems involved in the light - dependent reactions of photosynthesis in plants and algae.

Answer:

C. two