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Plant pigments absorb energy from the ________ spectrum during photosynthesis.
a. infrared b. electromagnetic c. visible light
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- In C3 plants, _______ makes sugar production inefficient when stomata close on hot, dry days. a. photosynthesis c. photorespiration b. photolysis d. carbon fixationFigure 5.7 On a hot, dry day, plants close their stomata to conserve Water. What impact will this have on photosynthesis?From a plant's perspective, the main purpose of photosynthesis is to Group of answer choices a)to produce sugars and oxygen for heterotrophs. b)plants are not cognitive organisms and therefore we have no idea what the "purpose" of photosynthesis is for the plant. c)to produce enough O2 gas for the plant to survive through the night. d)make sugars, such as glucose, to use for building cell walls and for energy needed by the plant.
- The purpose of the light-dependent reactions of photosynthesis is to - a split water to form oxygen b join glucose molecules to form starch c uses energy molecules like ATP d produce sugarsHow are the NADPH and G3P molecules made during photosynthesis similar? a. They are both end products of photosynthesis. b. They are both substrates for photosynthesis. c. They are both produced from carbon dioxide. d. They both store energy in chemical bonds.A. The C4 plant performs photosynthesis more efficiently than the C3 when the CO2 concentration is 600ppm or less. Provide one reason why the rate of photosynthesis doesn’t change for the C4 plant when the CO2 concentration increases above 400 ppm. B. Discuss what is happening in the C3 plant when the CO2 levels are below 50 ppm. Provide one reason why this does NOT happen to the C4 plant.
- Light is needed for photosynthesis, because it A. Provides energy, which is converted to chemical energy b. Provides, heat energy, which is converted to chemical energy c. Directly causes ATP production d. Brings water into the chloroplast e. Drives many enzymatic reactionsThe main purpose of the light-independent reactions is to ________. a. convert solar energy to chemical energy b. convert solar energy to ATP for short-term energy use c. build carbohydrates for long-term energy storageYou grow plants under two watering treatments: high water and low water. You examine photosynthetic rates as a function of light for plants in each treatment. Your results are in attached image A) Which treatment is dashed line B? a) high watering b) low watering B) What abiotic factor is limiting photosynthesis between the open circle and closed circle for treatment B? a) light b) water c) carbon dioxide C) What process is limiting photosynthesis between the open triangle and closed triangle for treatment A? a) light-dependent reactions b) calvin cycle
- You decide to plant a garden with a beautiful black walnut tree at one end and a majestic white oak at the other end. You are quite disappointed, however, when none of the seeds you plant around the walnut tree grow. What might explain this observation? a. The walnut tree filters out too much light, so the seeds fail to germinate. b. The roots of the walnut tree deplete all of the nutrients from the soil, so the new seedlings starve. c. The walnut tree produces chemical toxins that prevent seed germination.Animal cells conduct: A. Cellular Respiration B. Photosynthesis C. Both Plant cells conduct: A. Cellular Respiration B. Photosynthesis C. BothSelect the best answer describing the role of light in photosynthesis a.It is the source of respiration b.It is the source of carbon for the reaction c.It is the source of energy for the reaction d. all of these
