How chameleons change their color?
480673
The chameleon has several cell layers beneath its transparent skin. These layers are the source of the chameleon's color change. Some of the layers contain pigments, while others just reflect light to create new colors.\n\nSeveral factors contribute to the color change. A popular misconception is that chameleons change color to match their environment. This isn't true. Light, temperature, and emotional state commonly bring about a chameleon's change in color. The chameleon will most often change between green, brown and gray, which coincidently, often matches the background colors of their habitat.\n\nAnother interesting fact about the chameleon is that they can move their eyes in two different directions at the same time! Creepy, huh?\n\nHere's a link to an interesting article about the chameleon from our friends at PBS.
871643
i think those chamillion things change color.
639646
You should not confuse and animal that is albino with and animal that is merely white. For instance you can get white tigers that are not albino and you can tell because they have blue eyes (which indicates that they do it fact produce melanin - an albino can't). \n\nPigmentation is usually determined by multiple genes. It isn't just matter of IF the pigment is produced but WHERE it is distributed, WHEN it is produced (genes can turn on and off) and in what QUANTITY. So even if it has a working pigment gene it doesn't mean it will be expressed everywhere in the same way or at all. \n\nThere are all sorts of things that can contribute to the pattern of an animal. For instance Tortoise shell patterned cat are all female. Their pattern is due to the fact that the pigment genes are on the X chromosomes (of which famle cats have two). In females one of the two chromosome partially deactivates to stop them over producing certain proteins. This deactivation happens at random. Thus if the X chromosomes have different pigment alleles (gene variants) the cat will get patchs of different colours over its body. I don't know exactly how it works in pidgeons, but the point is it isn't down to one gene or even JUST genes but to other factors as well.
197078
You can do this with a search.\n\nWhen you specify the search parameters, choose Format and tell it to search for the color you want to change.\n\nWhen you specify the change to parameters, similarly tell it to change to the color you want.
1029529
The red color of crustaceans (and other marine animals, including salmon and certain types of algae)  is due largely to a pigment molecule called astaxanthin (see source).  In the shells of live crustaceans, this molecule is bound together with an protein (β-crustacyanin), which alters the shape of the astaxanthin molecule.  When bound together, this protein-pigment complex has a bluish color.  \n\nWhen you heat proteins, they denature, (i.e., they change shape), and in the case of shellfish, the β-crustacyanin "let's go" of the astaxanthin, which relaxes back to its normal structure and becomes red.
560835
with travelling electrons.depending on their wavelength,colours are formed
673869
I think you are looking at it from the wrong prospective, I wouldnt look at the melanin correlation in chimps or other great apes as to humans. Melanin is the pigment in our skin that helps protect us from the harmful Uv radiation that is present in our everyday lives.\n\n"Dermal melanin is produced by melanocytes, which are found in the stratum basale of the epidermis. Although human beings generally possess a similar concentration of melanocytes in their skin, the melanocytes in some individuals and races more frequently or less frequently express the melanin-producing genes, thereby conferring a greater or lesser concentration of skin melanin. Some individual animals and humans have no or very little melanin in their bodies, which is a condition known as albinism." Wiki. \n\nTherefore, you would see that certain races where melanin was more needed due to their living conditions would have more genes that would express the pigment. If you look at the trend of the globe, enviroments that arent on the poles or on the equator tend to have lighter skinned individuals.Its because they arent getting the direct sunlight/uv radiation that the people on the poles or the equator are getting.\n\nNow there is also the fact that there are different races of human and that these races tend to express pigments very differently from eachother. Such as why chimps are lighter skinned than gorillas... (not exactly a great example, but it will do) over long periods of time natural selection causes fluctuations in these trends, and now that we are seeing increased radiation, those that have stronger forms of melanin and a smaller predisposition to cancer tend to "pass on their genes" or have better reproductive success. Now, this is all relative and I could probably go on for hours about it, but in todays society since we arent nomadic / are particularily sedentary, if you tend to have darker or lighter skin colors it is due to your heratige.
325536
are you a chameleon???????
240642
I have hazel eyes and they change color anywhere from green, to green-brown, to blue.\n\nAll eye color can change over time because of age or, unfortunately, disease. \n\nEye disease is a cause of color change. So, ask a doctor to examine your eyes if you notice a slow loss of color. The change could be due to Fuch's heterochromic iridocyclitis, Horner's Syndrome, and pigmentary glaucoma, says Brian DeBroff, ophthalmology professor at Yale University. \n\nAging, however, is the usual cause of color change over time. So, yes, Emily. Color can change as we age. It does so for 10 to 15% of the normal Caucasian population. These people's eyes change slowly over many years after they reach adolescence. \n\nHow and why eye color changes - Pigment in the stroma (the connective tissue of the front layer of the iris) gives the iris color. Iris color can lighten if the number of pigment granules in the stroma decreases or if the granules produce lighter pigment. (See figure.) The iris can also lose color if the stroma pigment degrades. \n\nEyes, unlike skin and hair, do not synthesize color pigment continuously. Instead, eyes retain the pigment granules and accumulate them in the iris stroma. So, if the pigment degrades, the eye color lightens.\n\nLikewise, eyes can darken if the number of pigment granules increase or if the granules make darker pigment.\n\nThat's how the color changes. Why does it change? Genetics is the key as experimenters learned by studying twins. They observed the eyes and skin of identical twins and non-identical twins of American Caucasians between the ages of 3 months to 6 years. \n\nBoth sets of twins showed a "darkening with age of both the hair and eye colour," says Sturm. The identical twins changed color together, at essentially the same rate. The non-identical twins changed color but at different rates, which indicates a "strong genetic influence in the timing of these colour changes."\n\nEye color probably changes for the same reason we have one head instead of two: genes. Genes determine all body characteristics — including changing eye color as we age.
414202
(m)\n\nAs the sun begins to set, the light must travel farther through the atmosphere before it gets to you. More of the light is reflected and scattered. As less reaches you directly, the sun appears less bright. The color of the sun itself appears to change, first to orange and then to red. This is because even more of the short wavelength blues and greens are now scattered. Only the longer wavelengths are left in the direct beam that reaches your eyes\n\nThe sky around the setting sun may take on many colors. The most spectacular shows occur when the air contains many small particles of dust or water. These particles reflect light in all directions. Then, as some of the light heads towards you, different amounts of the shorter wavelength colors are scattered out. You see the longer wavelengths, and the sky appears red, pink or orange
559569
Many lizards can change their color more or less drastically. In particular, most change between darker and lighter colors with respect to the external temperature and sun radiation (darker to absorb more solar energy, lighter to reflect it).\nHowever, the anoles (genus Anolis) are American lizards that show striking color changes, and are commonly called "chameleons" even though they're not closely related to the real ones. \nThis is one of the common species in North America:\nhttp://www.zo.utexas.edu/research/txherps/lizards/anolis.carolinensis.html
96275
A purple gallinule is purple. Also an octopus or squid can make itself purple by changing it's color and maybe a chameleon too. But if I can only go with one I'll say the Purple Monarch Butterfly.
313542
Camouflage.  They often look like a branch of coral and blend in with their surroundings.
421471
In pigments (like paint) yellow and blue make green.\n\nIn lights, if you mix red and green lights, you get yellow light. If you add in blue light, you get white light, so for lights, yellow and blue make white.
954978
it is the change in pigment colour.All plant cells have organells called plastids .Depending on the colour theyare divided in to3 groups\nGreen colour plastids are called chloroplasts they have chlorophyll pigment\nColored other then green(yellow ,red) plastids are called chromoplasts.They have xanthopyll and carotenois pigments\n\nColour less plastids are called leucoplasts\nThe main charactr of plastids is they can change from chloroplast to chromoplast or to lecucoplast or vice versa\n\nTha t is the reason we can see green bell peppers red and yellow ones\nEven th e leaf colour change in fall is also depends onthe same character
208896
just mix 'em up  , if you give me the name of 'all ' the colours , i will tell you how to make them\n\nI guess you mean primary colours (= base colours)\nthese are yellow red and blue\n\nyellow and red will make orange\nyellow and blue will make green\nred and blue will make purple\nyellow , red and blue will make brown\nmix them up in different proportions to get all the other colours
1002921
Chromatophore is the collective term for pigment-containing and light-reflecting cells found in amphibians, fish, reptiles, crustaceans and cephalopods. They are largely responsible for generating skin and eye colour in cold-blooded animals and are generated in the neural crest during embryonic development. Mature chromatophores are grouped into subclasses based on their colour (more properly "hue") under white light: xanthophores (yellow), erythrophores (red), iridophores (reflective / iridescent), leucophores (white), melanophores (black/brown) and cyanophores (blue).\n\nSome species can rapidly change colour through mechanisms that translocate pigment and reorient reflective plates within chromatophores. This process, often used as a type of camouflage, is called physiological colour change. Cephalopods such as octopus have complex chromatophore organs controlled by muscles to achieve this, while vertebrates such as chameleons generate a similar effect by cell signaling. Such signals can be hormones or neurotransmitters and may be initiated by changes in mood, temperature, stress or visible changes in local environment.\n\nUnlike cold-blooded animals, mammals and birds have only one class of chromatophore-like cell type: the melanocyte. The cold-blooded equivalent, melanophores, are studied by scientists to understand human disease and used as a tool in drug discovery.\n\nContents [hide]