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  2. Photoperiodism - Wikipedia

    en.wikipedia.org/wiki/Photoperiodism

    The rotation of the earth around its axis produces 24 hour changes in light (day) and dark (night) cycles on earth. The length of the light and dark in each phase varies across the seasons due to the tilt of the earth around its axis. The photoperiod defines the length of the light, for example a summer day the length of light could be 16 hours ...

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  4. Diurnality - Wikipedia

    en.wikipedia.org/wiki/Diurnality

    Light is one of the most defining environmental factors that determines an animal's activity pattern. [5] Photoperiod or a light dark cycle is determined by the geographical location, with day time being associated with much ambient light, and night time being associated with little ambient light. [5]

  5. Light Cycle - Wikipedia

    en.wikipedia.org/wiki/Light_Cycle

    Light Cycles became well-known in popular culture as one of the first mainstream cinematic appearances of a sports bike [citation needed], and have been called symbols of futurism and posthumanism. In an analysis, author Esperanza Miyake interpreted the Light Cycles of the original Tron as representations of male power: only men get the chance ...

  6. Dick and Jane - Wikipedia

    en.wikipedia.org/wiki/Dick_and_Jane

    The Dick and Jane primers introduced new readers to one new word on each page and only five new words in each individual story. [2] [3] Gray and Sharp also wanted children who read the books to be able to readily identify with the characters. Sharp chose stories where the characters participated in typical children's activities. [7] [8]

  7. Light-dependent reactions - Wikipedia

    en.wikipedia.org/wiki/Light-dependent_reactions

    The cyclic light-dependent reactions occur only when the sole photosystem being used is photosystem I. Photosystem I excites electrons which then cycle from the transport protein, ferredoxin (Fd), to the cytochrome complex, b 6 f, to another transport protein, plastocyanin (Pc), and back to photosystem I. A proton gradient is created across the ...

  8. Calvin cycle - Wikipedia

    en.wikipedia.org/wiki/Calvin_cycle

    The Calvin cycle, light-independent reactions, bio synthetic phase, dark reactions, or photosynthetic carbon reduction (PCR) cycle [1] of photosynthesis is a series of chemical reactions that convert carbon dioxide and hydrogen-carrier compounds into glucose. The Calvin cycle is present in all photosynthetic eukaryotes and also many ...

  9. Light effects on circadian rhythm - Wikipedia

    en.wikipedia.org/wiki/Light_effects_on_circadian...

    [6] [4] Light seems to have therapeutic antidepressant effects when an organism is exposed to it at appropriate times during the circadian rhythm, regulating the sleep-wake cycle. [ 6 ] [ 4 ] In addition to mood, learning and memory become impaired when the circadian system shifts due to light stimuli, [ 6 ] [ 20 ] which can be seen in studies ...

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