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The compensation point for light is the level of illumination at which there is precisely no net production of oxygen. At this stage, the rate of oxygen production by photosynthesis and the amount of oxygen used by the plant as a result of cellular respiration are equal. However, there are some expenses associated with increased photosynthetic capacity in sun plants. As compared to shade plants, sun plants often have higher rates of leaf respiration, which raises the light-compensation point. Because shade leaves have a thinner coating of mesophyll cells and more chloroplasts, they are better able to capture sunlight at low radiation levels.The compensation point for light is the level of illumination at which there is precisely no net production of oxygen. At this stage, the rate of oxygen production by photosynthesis and the amount of oxygen used by the plant as a result of cellular respiration are equal. However, there are some expenses associated with increased photosynthetic capacity in sun plants. As compared to shade plants, sun plants often have higher rates of leaf respiration, which raises the light-compensation point. Because shade leaves have a thinner coating of mesophyll cells and more chloroplasts, they are better able to capture sunlight at low radiation levels.
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- But how are the two types of mesophyll involved? From what I understand, CO2 enters the stomata, and then the citric acid cycle of the mitochondia in the mesophyll use the carbon atoms do produce glucose, which then goes through phloem loading and it either used or stored. My question, I guess, is how exactly are the two types of mesophyll involved? Is only one used or are both used at different times in the production of the glucose?arrow_forwardStomata can open and close in order to modulate the transpiration stream and allow for exchange of oxygen and CO2. Stomata OPEN by…arrow_forwardA C4 plant minimizes photorespiration by (note that we are talking about standard C4 plant, not CAM plants here) O having the light reactions and carbon reactions occur in different cells, so oxygen does not come into contact with rubisco O having the light reactions and carbon reactions occur in different cells, so carbon dioxide does not come into contact with rubisco O stomata that are only opened at night, storing oxygen in malate, and releasing oxygen during the day O stomata that are only opened at night, storing carbon dioxide in malate, and releasing carbon dioxide during the dayarrow_forward
- The Calvin cycle (light-independent reaction) occurs in the Matrix Xylem Cristae membrane Stroma Thylakoid membranearrow_forwardWhich (look at figure) is an accessory pigment in red flowers?arrow_forwardwhat will be the end result of plant growth under sun and those under shade. Explain in two paragraphs?arrow_forward
- Rubisco can bind with CO2 or 02. When it binds with O2, it "wastes" some of the energy captured from the sun. This reaction is photorespiration and is favored at high temperatures and low CO2:02 ratios. Which of the following strategies should limit photorespiration (select all that apply). Keep stomata closed. Keep stomata open. Physically separate the light and light-independent reactions. Temporally separate CO2 uptake and fixation.arrow_forwardA mutation causes the vascular cambium in a plant to stop working How does this impact cellular respiration? ANSWER CHOICES ARE IN THE PHOTO. thanksarrow_forwardWhich of the following would allow a plant to tolerate a cold environment? Group of answer choices A. producing small, smooth leaves with a small boundary layer B. generating sparsely placed leaf hairs to reflect solar radiation C. increasing the proportion of unsaturated fatty acids in cell membranes D. increasing evapotranspiration E. increasing the proportion of leaf mass relative to total body massarrow_forward
- Stomatal opening is induced by…arrow_forwardPlease be very very fast Which of the following is NOT a function or characteristic of stems of plants? Question 1 options: transporting sugars and water between the roots and the leaves. Exhibiting a negative phototropism. Supporting leaves. Exhibiting a positive phototropism.arrow_forwardHow will the CO2 concentration change in the field influence leaf photosynthesis measurements?arrow_forward
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