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Há 3 dias · Definitions. Domestication (not to be confused with the taming of an individual animal), is from the Latin domesticus, 'belonging to the house'. The term remained loosely defined until the 21st century, when the American archaeologist Melinda A. Zeder defined it as a long-term relationship in which humans take over control and care of another organism to gain a predictable supply of a resource ...
Há 1 dia · However, not all interactions in the blue-spotted salamander's environment are positive. Like many other amphibians, these salamanders face the threat of predation. They are preyed upon by a variety of predators, including snakes, birds, and small mammals. To protect themselves, blue-spotted salamanders have developed several defense mechanisms.
Há 2 dias · These characteristics taken together suggest that Archaeopteryx had the keen sense of hearing, balance, spatial perception, and coordination needed to fly. Archaeopteryx had a cerebrum-to-brain-volume ratio 78% of the way to modern birds from the condition of non- coelurosaurian dinosaurs such as Carcharodontosaurus or Allosaurus , which had a crocodile-like anatomy of the brain and inner ear ...
Há 2 dias · Cnidaria. Cnidaria ( / nɪˈdɛəriə, naɪ -/ nih-DAIR-ee-ə, NY-) [4] is a phylum under kingdom Animalia containing over 11,000 species [5] of aquatic animals found both in fresh water and marine environments (predominantly the latter), including jellyfish, hydroids, sea anemones, corals and some of the smallest marine parasites.
Há 2 dias · Some mammals have broken this trend before, however, as woolly mammoths (Mammuthus primigenius) evolved to have thick coats of hair and a very short tail in response to cold climates. The idea that the American mastodon had hair is possible because of the seasonal climates, but there are few preserved soft tissues to support this idea, referencing the hairs found in Wisconsin.
Há 2 dias · Pterosaur pelts might have been comparable in density to many Mesozoic mammals. Relation with feathers. Pterosaur filaments could share a common origin with feathers, as speculated in 2002 by Czerkas and Ji. In 2009, Kellner concluded that pycnofibers were structured similarly to theropod proto-feathers.
Há 1 dia · Crocodilia (or Crocodylia, both / krɒkəˈdɪliə /) is an order of mostly large, predatory, semiaquatic reptiles known as crocodilians. They first appeared 94 million years ago in the Late Cretaceous period ( Cenomanian stage) and are the closest living relatives of birds, as the two groups are the only known survivors of the Archosauria.
