Which of the following BEST describes the benefit to early photosynthetic organisms gained by having two different photosystems in one cell?
A)These organisms produced carbohydrates at twice the rate of organisms with a single photosystem.
B)They produced oxygen.
C)They could use water as an electron donor.
D)They could thrive in places where there was little or almost no light.

Question

Quizplus · Accepted Answer

Having two different photosystems in one cell allowed early photosynthetic organisms to use water as an electron donor, which increased their ability to produce energy through photosynthesis. This was a significant advantage over organisms with only one photosystem, which were unable to use water as an electron donor and thus could not produce oxygen. The development of two photosystems ultimately led to the evolution of oxygen-producing photosynthesis and the oxygenation of Earth's atmosphere.

Which of the Following BEST Describes the Benefit to Early