Describe and explain the effect of carbon dioxide concentration on the average rates of photosynthesis of the soybean plants from 04:00 to 22:00. Use the data from Fig. 2.1 in your answer.

- description: rate (of photosynthesis) peaks at, 12:00 / midday / noon ; photosynthesis starts at, 06:00 / stops at, 20:00 / 8 pm ; rate (of photosynthesis) at 550 (ppm) / AW, is greater than at, 370 (ppm) / AW ; both plots / 550 and 370 ppm, follow same trend / pattern ; comparative data quote between two plots with units at least once ; - explanation: maximum light at 12:00 / dark until 6:00 / after, 20:00 / 8 pm ; reference to light intensity as a limiting factor ; because light is required for photosynthesis ; - reference to CO2 as a limiting factor ; (at high atmospheric CO2) the concentration gradient (to air spaces) is steeper / diffusion is faster ; effect of CO2 concentration is most at high light intensities ; ora -reference to temperature as a limiting factor higher temperature caused increase rate of photosynthesis