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11 Cards in this Set
- Front
- Back
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photoautotroph
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an organism that harnesses light energy to drive the synthesis or organic compounds from CO2
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stomata
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microscopic pores surrounded by guard cells in the epidermis of leaves and stems that allows gas exchange between the environment and the interior of the plant
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thylakoid membrane
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a flattened membrane sac inside the cholorplast, used to convert light energy to chemical energy
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C.B. van Niel
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studied sulfur bacteria and discovered that photosynthesis is a light dependent redox reaction
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electromagnetic spectrum
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the entire spectrum of radiation; ranges in wavelength from less than a nanometer to more than a kilometer
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photon
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a quantum, or discrete amount, of light energy
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absorbtion spectrum
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the range of a pigment's ability to absorb various wavelengths of light
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action spectrum
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shows which wavelength of light is most effectively used in a specific chemical reaction
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chlorphyll a
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the only pigment that can participate directly in the light reactions
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accessory pigment
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pigments other than cholophyll a that transfer energy to c.a. and absorb different wavelengths of light
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carotenoids
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acessory pigments in the cholorplasts of plants; by absorbing wavelengths of light that cholorphyll cannot, they broaden the spectrum of colors that can drive photosynthesis
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