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The word is derived from the Greek φαίνω (phainō), "to show, to bring to light, make to appear" [6] + λόγος (), amongst others "study, discourse, reasoning" [7] and indicates that phenology has been principally concerned with the dates of first occurrence of biological events in their annual cycle.
This shows how important both of the photoreceptors are in regards to determining day-length. [ 11 ] Modern biologists believe [ 12 ] that it is the coincidence of the active forms of phytochrome or cryptochrome, created by light during the daytime, with the rhythms of the circadian clock that allows plants to measure the length of the night.
Some animals that are nocturnal have disadvantages in animal sensory systems, such as bats, they have poor vision and use other adaptations such as echolocation, something a non-nocturnal animal would not have. Photoperiodism is the ability of plants and animals to use the length of day or night, resulting in the modification of their ...
A dragonfly in its radical final moult, metamorphosing from an aquatic nymph to a winged adult.. In biology, moulting (British English), or molting (American English), also known as sloughing, shedding, or in many invertebrates, ecdysis, is a process by which an animal casts off parts of its body to serve some beneficial purpose, either at specific times of the year, or at specific points in ...
"Long day" breeders cycle when days get longer (spring) and are in anestrus in fall and winter. Some animals that are long day breeders include ring-tailed lemurs, horses, hamsters, groundhogs, and mink. "Short day" breeders cycle when the length of daylight shortens (fall) and are in anestrus in spring and summer.
Dog Days is an American reality television series which aired on Animal Planet in the fall of 2002. [1] [2] The show followed a number of New Yorkers, notably former Saturday Night Live choreographer Danielle Flora and top male model Edward Cruz, as they raised their pet dogs in New York City. Dog Days aired eight episodes, and was not renewed ...
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In most species that produce a determinate inflorescence in this way, all of the flower buds are formed before the first ones begin to open, and all open more or less at the same time. In some species with determinate inflorescences however, the terminal flower blooms first, which stops the elongation of the main axis, but side buds develop ...