In the classic experiment to determine the action spectrum of photosynthesis, T.W. Engelmann used which organism as the oxygen producer?
Q1. In the classic experiment to determine the action spectrum of photosynthesis, T.W. Engelmann used which organism as the oxygen producer?
Answer: Spirogyra
Explanation: Engelmann used Spirogyra (a filamentous alga) to show that bacteria clustered where oxygen was produced in red and blue light.