Answer:
6 (b)
Step-by-step explanation:
as wavelength increases, rate (of photosynthesis) decreases and increases ; high rates in, blue and violet and red / 400–475 nm and 675 nm ; low(est) rate in, green and yellow / 550–600 nm ; either maximum rate = 0.9 cm3, at 675 nm / redor minimum rate = 0.2 cm3, at 550 nm / green ;