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Biological Pigments
A biological pigment, also known simply as a pigment or biochrome, is a substance produced by living organisms that have a color resulting from selective color absorption. Biological pigments include plant pigments and flower pigments. Many biological structures, such as skin, eyes, feathers, fur and hair contain pigments such as melanin in specialized cells called chromatophores. In some species, pigments accrue over very long periods during an individual's lifespan. Pigment color differs from structural color in that it is the same for all viewing angles, whereas structural color is the result of selective reflection or iridescence, usually because of multilayer structures. For example, butterfly wings typically contain structural color, although many butterflies have cells that contain pigment as well. Biological pigments See conjugated systems for electron bond chemistry that causes these molecules to have pigment. * Heme/ porphyrin-based: chlorophyll, bilirubin, he ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Melopsittacus Undulatus
The budgerigar ( ; ''Melopsittacus undulatus''), also known as the common parakeet, shell parakeet or budgie ( ), is a small, long-tailed, seed-eating parrot native to Australia. Naturally the species is green and yellow with black, scalloped markings on the nape, back, and wings. Budgies are bred in captivity with colouring of blues, whites, yellows, greys, and even with small Crest (feathers), crests. Juveniles and chicks are Sexual dimorphism, monomorphic (the sexes are visually indistinguishable), while adults are told apart by their Beak#Cere, cere colouring and their behaviour. The species is Monotypic taxon, monotypic, meaning it is the only member of the genus ''Melopsittacus'', which is the only genus in the Melopsittacini tribe. The budgerigar is closely related to lories and lorikeets, lories and the fig parrots. The origin of the budgerigar's name is unclear. First recorded in 1805, budgerigars are popular pets around the world due to their small size, low cos ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
