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Bear taxon names such as Arctoidea and Helarctos come from the ancient Greek ἄρκτος (arktos), meaning bear, [7] as do the names "arctic" and "antarctic", via the name of the constellation Ursa Major, the "Great Bear", prominent in the northern sky. [8] Bear taxon names such as Ursidae and Ursus come from Latin Ursus/Ursa, he-bear/she ...
Individual bears vary in size seasonally, weighing the least in spring due to lack of foraging during hibernation, and the most in late fall, after a period of hyperphagia to put on additional weight to prepare for hibernation. [38] [39] Brown bear skeleton. Brown bears generally weigh 80 to 600 kg (180 to 1,320 lb), with males outweighing ...
Bear habitats are generally forests, though some species can be found in grassland and savana regions, and the polar bear lives in arctic and aquatic habitats. Most bears are 1.2–2 m (4–7 ft) long, plus a 3–20 cm (1–8 in) tail, though the polar bear is 2.2–2.44 m (7–8 ft) long, and some subspecies of brown bear can be up to 2.8 m (9 ...
Tardigrade anatomy [3] Tardigrades have a short plump body with four pairs of hollow unjointed legs. Most range from 0.1 to 0.5 mm (0.004 to 0.02 in) in length, although the largest species may reach 1.3 mm (0.051 in). The body cavity is a haemocoel, an open circulatory system, filled with a colourless fluid.
The kidney takes a key role in maintenance of the constant internal environment. The relative ionic composition of the extracellular fluid is similar between marine fish and all subsequent species. Therefore, it can be said that the kidneys made it possible to preserve approximately the same composition of extracellular fluid in vertebrates as ...
Ursus is a genus in the family Ursidae that includes the widely distributed brown bear, [3] the polar bear, [4] the American black bear, and the Asian black bear. The name is derived from the Latin ursus , meaning bear .
Bears quarterback Justin Fields, having the game of his NFL career to that point, had just danced around two Denver Broncos defenders to deliver a 2-yard touchdown strike to Khalil Herbert.
Ursoidea is a superfamily of arctoid carnivoran mammals that includes the families Subparictidae, [1] [2] Amphicynodontidae, [3] [2] and Ursidae.The last family includes the extant lineages of bears, as well as the extinct Hemicyoninae [4] [5] and Ursavinae.