Emmerson defined 'red drop' as a decline in photosynthesis also termed – McqOptions

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1.	Emmerson defined 'red drop' as a decline in photosynthesis also termed Emmerson's effect. It appears at
A.	460 nm wavelength
B.	630 nm wavelength
C.	680 nm wavelength
D.	680 nm wavelength
Answer» E.

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