(2) In curve I, the light intensity and temperature at 8: 00 and 12: 00 are generally different, so the amount of CO2 fixed by dark reaction is not necessarily equal.
(3) In the analysis diagram, curve ⅰ and curve ⅲ are female plants, and the net photosynthetic rate of ditch bottom and soil slope is lower than that of male plants ⅱ and ⅳ, so the change of soil water content has little effect on the net photosynthetic rate of female plants.
(4) By analyzing the graph curve, it can be seen that the organic matter accumulation per unit leaf area of female and male plants is less than that of male plants at the bottom of the ditch between14: 00 and16: 00.
(5) Between12: 00 ~14: 00, the main external factors leading to the decline of I and II curves are light intensity and carbon dioxide concentration.
So the answer should be:
(1) Mitochondria and chloroplasts ② Not necessarily? The temperature and light intensity at these two moments are generally different? (3) Female plants
(4)