Transpiration is when a plant release water vapor through its stomata which are pores its leaves and stems what other process in the water cycle is this most similar to explain your reasoning
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- Photosynthesis directly opposes respiration in determining how plants influence atmospheric CO2 concentrations. When a leaf is in the light, both photosynthesis and respiration are occurring simultaneously. The data in the Table were collected from the leaf of a sagebrush plant that was enclosed in a chamber that measures the rate of CO2 exchange. The same leaf was used to collect the data in Interpret the Data in Chapter 7. Respiration is shown as a negative and photosynthesis as a positive rate of CO2 exchange. The net photosynthesis rate is the amount of CO2 (in micromoles per square meter per second) assimilated by the leaf while respiration is occurring; a positive value indicates more photosynthesis is occurring than respiration. The light exposed to the leaf is quantified as the number of photons in the 400 to 700 nm wavelength, the photosynthetic photon flux density (PPFD); 2,000 mol/m2/s is equivalent to the amount of light occurring at midday in full Sun. Observation Photosynthetic Photon Flux Density (PPFD) (mol/m2/s) Net Photosynthesis (mol/m2/s) 1 2,000 9.1 2 1,500 8.4 3 1,250 8.2 4 1,000 7.4 5 750 6.3 6 500 4.8 7 250 2.2 8 0 -2.0 Why is net photosynthesis negative when PPFD is zero? Looking at the respiration data from Interpret the Data in Chapter 7, at what temperature do you think these data were collected? Source: Data based on unpublished research by Brent Ewers, University of Wyoming.You have to design a leaf that has been adapted to grown in a dry environment by limiting transpiration. In your design you have to include at least four (4) adaptations and explain how this adaptation will contribute to the plant’s ability to grow in these conditions.Why do land plants have stomates (sometimes called stomata)? a. To allow plants to take in carbon dioxide from the atmosphere. b. All of the choices are true; none are false. c. To control water loss while allowing for the uptake of some raw materials of photosynthesis. d. They allow the plant to have some control over transpiration rates.
- The number of twigs on your tree: 154,000 twigs Based on transpiration measurements that we have made in previous years; each twigtranspires about 3 grams of water per hour on a warm spring day. That is, multiply your tree’s twigs by 3. This is a rough average for all sides of the tree (the south side, exposed to the sun, and the north side, with indirect light.) Calculate the number of grams of water per hour that your tree transpires. ____________g/hr Now convert your grams of water to kilocalories. Remember that the evaporation of a gram of water uses about 0.6 kilocalories of heat, which comes from the air. _____________ kcal/hr Assume that a day is 10 hours long and a month is 30 days. How many kilocalories per month does your tree account for? _________ kcal/mo How many kilowatt hours of electricity would it take to have an air conditioner use this number of kilocalories? One kilowatt hour takes about 860 kilocalories of evaporation. Transpiration in your tree…Cottonwood trees are commonly found along river banks and irrigation ditches. They have broad flat leaves and can transpire 200 gallons of water per day. Many succulent plants live in hot, arid environments and have thick leaves with a wax-like substance covering their leaves. They generally open their stomata for gas exchange at night. Using your understanding of transpiration, find the adaptations that allow these plants to survive in their respective environments.Which of the following is the process of water movement through a plant and its evaporation from leaves? Group of answer choices Transpiration Respiration Evaporation Photosynthesis Perspiration
- Water potential is a driving force in plants’ ability to transport water. Explain what water potential is, and describe a specific example of its role in water movement throughout a plant.What are potential outcomes when a plant's stomata close in response to heat and water stress? Select all that apply. CO2 and O2 may compete for the active site of rubisco. Photorespiration is more likely to occur. Photosynthesis is more efficient. Gas exchange comes to a halt.In an oak tree leaf 80 feet above the ground a cell of the spongy mesophyll is Photosynthesizing explain how the rest of the tree is meeting the physiological needs of the cell.
- Plants balance water loss against photosynthesis by controlling the opening of its stomata as a response to environmental conditions. Indicate the level of transpiration rate (low, medium, high) for the environmental conditions below and explain your answer. Clear skies, hot, moist soil Clear skies, hot, dry soil Cloudy, hot dry soilPhotorespiration becomes more likely when a. CO2 concentrations are high in leaf cells. b. stomata remain closed in C3 plants. c. glucose concentrations are low in leaf cells. d. ATP binds to rubisco.An important factor for plants is the amount of water lost for each molecule of carbon dioxide absorbed. How could he plant be harmed if it loses a lot of water for each carbon dioxide molecule, that is, if the ratio is too high?