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The chicken embryo is a unique model that overcomes many limitations to studying the biology of cancer in vivo. The chorioallantoic membrane (CAM), a well-vascularized extra-embryonic tissue located underneath the eggshell, has a successful history as a biological platform for the molecular analysis of cancer including viral oncogenesis, [8] carcinogenesis, [9] tumor xenografting, [1] [10] [11 ...
A feral rooster on the island of Kauai A family of feral chickens, Key West, Florida. Feral chickens are derived from domestic chickens (Gallus domesticus) who have returned to the wild. Like the red junglefowl (the closest wild relative of domestic chickens), feral chickens will roost in bushes in order to avoid predators at night. [1]
The word "poultry" comes from Middle English pultry or pultrie, itself derived from Old French/Norman word pouletrie. [7] The term for an immature poultry, pullet, like its doublet poult, [8] comes from Middle English pulet and Old French polet, both from the Latin word pullus, meaning a young fowl or young animal.
Modern varieties however grow much faster; by day 35 a Ross 708 broiler may weigh 1.8 kg (4.0 lb) as against the 1.05 kg (2.3 lb) of a heritage chicken of the same age. [ 21 ] Adult chickens of both sexes have a fleshy crest on their heads called a comb or cockscomb, and hanging flaps of skin on either side under their beaks called wattles ...
If the question refers to chicken eggs specifically, the answer is still the egg, but the explanation is more complicated. [8] The process by which the chicken arose through the interbreeding and domestication of multiple species of wild jungle fowl is poorly understood, and the point at which this evolving organism became a chicken is a ...
Illustration of thirty-nine varieties of chicken (and one Guinea Fowl) . There are hundreds of chicken breeds in existence. [1] Domesticated for thousands of years, distinguishable breeds of chicken have been present since the combined factors of geographical isolation and selection for desired characteristics created regional types with distinct physical and behavioral traits passed on to ...
Domestication has been defined as "a sustained multi-generational, mutualistic relationship in which one organism assumes a significant degree of influence over the reproduction and care of another organism in order to secure a more predictable supply of a resource of interest, and through which the partner organism gains advantage over individuals that remain outside this relationship ...
A marine coastal ecosystem is a marine ecosystem which occurs where the land meets the ocean. Worldwide there is about 620,000 kilometres (390,000 mi) of coastline. Coastal habitats extend to the margins of the continental shelves, occupying about 7 percent of the ocean surface area.