Engelmann's experiment with Spirogyra demonstrated that [BVP 2003] – McqOptions

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1.	Engelmann's experiment with Spirogyra demonstrated that [BVP 2003]
A.	The full spectrum of sunlight is needed for photosynthesis
B.	Only red wavelengths are effective in causing photosynthesis
C.	Only blue wavelengths are effective
D.	Both blue and red wavelengths are effective
Answer» E.

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