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  2. Diurnality - Wikipedia

    en.wikipedia.org/wiki/Diurnality

    Steppe eagles are diurnal, and hunt during the day. Humans are diurnal, and organize their work and business mainly in the day. [a] Diurnality is a form of plant and animal behavior characterized by activity during daytime, with a period of sleeping or other inactivity at night. The common adjective used for daytime activity is "diurnal". The ...

  3. Crepuscular animal - Wikipedia

    en.wikipedia.org/wiki/Crepuscular_animal

    A number of factors affect the time of day an animal is active. Predators hunt when their prey is available, and prey try to avoid the times when their principal predators are at large. The temperature may be too high at midday or too low at night. [2] Some creatures may adjust their activities depending on local competition.

  4. Diurnal cycle - Wikipedia

    en.wikipedia.org/wiki/Diurnal_cycle

    Earth's rotation relative to the Sun causes the 24-hour day/night cycle. A diurnal cycle (or diel cycle) is any pattern that recurs every 24 hours as a result of one full rotation of the planet Earth around its axis. [1] Earth's rotation causes surface temperature fluctuations throughout the day and night, as well as weather changes throughout ...

  5. Sleep cycle - Wikipedia

    en.wikipedia.org/wiki/Sleep_cycle

    Sample hypnogram showing one sleep cycle (the first of the night) from NREM through REM. The sleep cycle is an oscillation between the slow-wave and REM (paradoxical) phases of sleep. It is sometimes called the ultradian sleep cycle, sleep–dream cycle, or REM-NREM cycle, to distinguish it from the circadian alternation between sleep and ...

  6. Photoperiodism - Wikipedia

    en.wikipedia.org/wiki/Photoperiodism

    [3] [4] Photoperiodic flowering plants are classified as long-day plants or short-day plants even though night is the critical factor because of the initial misunderstanding about daylight being the controlling factor. Along with long-day plants and short-day plants, there are plants that fall into a "dual-day length category".

  7. Circadian rhythm - Wikipedia

    en.wikipedia.org/wiki/Circadian_rhythm

    Sleeping tree by day and night. Plant circadian rhythms tell the plant what season it is and when to flower for the best chance of attracting pollinators. Behaviors showing rhythms include leaf movement , growth, germination, stomatal/gas exchange, enzyme activity, photosynthetic activity, and fragrance emission, among others. [58]

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  9. Day & Night (2010 film) - Wikipedia

    en.wikipedia.org/wiki/Day_&_Night_(2010_film)

    Day & Night follows two characters, Day and Night. Inside Day is a day scene with a sun in the center, and inside Night is a night scene with a moon in the center. Whatever goes on inside of Day or Night expresses normal events that typically occur within a day or night, respectively, and these events often correspond with actions or emotions that Day or Night express o

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