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  2. Photosynthetic efficiency - Wikipedia

    en.wikipedia.org/wiki/Photosynthetic_efficiency

    The photosynthetic efficiency (i.e. oxygenic photosynthesis efficiency) is the fraction of light energy converted into chemical energy during photosynthesis in green plants and algae. Photosynthesis can be described by the simplified chemical reaction 6 H 2 O + 6 CO 2 + energy → C 6 H 12 O 6 + 6 O 2

  3. Photosynthesis - Wikipedia

    en.wikipedia.org/wiki/Photosynthesis

    The average rate of energy captured by global photosynthesis is approximately 130 terawatts, [6] [7] [8] which is about eight times the total power consumption of human civilization. [9] Photosynthetic organisms also convert around 100–115 billion tons (91–104 Pg petagrams, or billions of metric tons), of carbon into biomass per year.

  4. Light-dependent reactions - Wikipedia

    en.wikipedia.org/wiki/Light-dependent_reactions

    This is one of two core processes in photosynthesis, and it occurs with astonishing efficiency (greater than 90%) because, in addition to direct excitation by light at 680 nm, the energy of light first harvested by antenna proteins at other wavelengths in the light-harvesting system is also transferred to these special chlorophyll molecules.

  5. Texas Assessment of Knowledge and Skills - Wikipedia

    en.wikipedia.org/wiki/Texas_Assessment_of...

    The official logo of the TAKS test. Mainly based on the TAAS test's logo. The Texas Assessment of Knowledge and Skills (TAKS) was the fourth Texas state standardized test previously used in grade 3-8 and grade 9-11 to assess students' attainment of reading, writing, math, science, and social studies skills required under Texas education standards. [1]

  6. St Petersburg Classical Gymnasium - Wikipedia

    en.wikipedia.org/wiki/St_Petersburg_Classical...

    However, the number of exams in the gymnasium is large and is growing from one in the 5th grade to five in the 9th grade (and later). Secondary School Annual Exams: 5th grade: Latin + Math Test; 6th grade: Latin, History + Math Test; 7th grade: Latin, Geometry, English/German + Algebra Test, Biology Test

  7. Hill reaction - Wikipedia

    en.wikipedia.org/wiki/Hill_reaction

    These dyes permitted the finding of electron transport chains during photosynthesis. Dichlorophenolindophenol (DCPIP), an example of these dyes, is widely used by experimenters. DCPIP is a dark blue solution that becomes lighter as it is reduced. It provides experimenters with a simple visual test and easily observable light reaction. [8]

  8. Photosystem II - Wikipedia

    en.wikipedia.org/wiki/Photosystem_II

    Photosystem II (or water-plastoquinone oxidoreductase) is the first protein complex in the energy-dependent reactions of oxygenic photosynthesis. It is located in the thylakoid membrane of plants, algae, and cyanobacteria.

  9. Emerson effect - Wikipedia

    en.wikipedia.org/wiki/Emerson_effect

    The Emerson effect is the increase in the rate of photosynthesis after chloroplasts are exposed to light of wavelength less than 680 nm (deep red spectrum) and more than 680 nm (far red spectrum). When simultaneously exposed to light of both wavelengths, the rate of photosynthesis is higher than the sum of the red light and far red light ...

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