In the fall, the amount of sunlight that plants receive decreases. Which of the following might happen? a. decrease in production of CO₂ b. increase in production of CO₂ c. decrease in sugar production d. increase in sugar production
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- 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 soilLeaf tissue with sunken stomata will have ___ humidity near the stomata and ___ transpiration. Select one: a. increased, decreased b. decreased, increased c. increased, increased d. decreased, decreasedGas exchange in a plant's leaf consists of _____ entering the leaf tissue, and _____ exiting from it. A)oxygen (O2); carbon dioxide B)carbon dioxide; ammonia C)carbon dioxide; oxygen (O2) D)water; carbon dioxide 16.
- To which of the two lighting conditions would you expose seedlings if you wanted to maximize the rate of photosynthesis in the plants as well as minimizing your costs for electricity to light the plants in the greenhouse? A. Low light only. B. Moderate light only. C. Low light for the first 12 hours and then moderate light afterwards. D. Moderate light for the first 12 hours and then low light afterwards.All other factors being equal, tiny hairs near the stomata will _______ transpiration. All other factors being equal, an increase in wind speed will _______ transpiration. Select one: a. decrease, decrease b. increase, decrease c. increase, increase d. decrease, increasesuppose you were a farmer trying to growplants in a greenhouse. why is it important to know what the limiting factor is(light intensity, temperature or co2 level)
- Plant experiencing cavitation may exhibit signs of ________. Cavitation is observed in the _____ Select one: a. drought stress, xylem b. enhanced photosynthesis, xylem c. decreased photosynthesis, phloem d. drought stress, phloem e. enhanced photosynthesis, leavesApproximately how much chlorophyll was present in the moderate-light plants after 24 hours? A. about 200 micrograms/g B. about 225 micrograms/g C. about 300 micrograms/g D. about 400 micrograms/gChoose correct option and explain. A plant wilts when- a) sunlight is not available and the rate of photosynthesis slows down. b) the mycorrhizae among its roots have "stolen" too much water from the plant. c) it is sad. d) turgor pressure in cells' central vacuoles is high. e) turgor pressure in cells' central vacuoles is low
- Two major processes are involved in the dissipation of heat from plant leaves: convection of heat, and(a) Photosynthesis (b) Stomatal Conductance (c) Mineral Nutrition (d) Transpiration (e) GrowthWhat 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.Which of the following would tend to increase transpiration?(A) spiny leaves(B) sunken stomata(C) a thicker cuticle(D) higher stomatal density