In biology, a<unk>  or biochrome is any material resulting in color of plant or animal cells, which is the result of selective color absorption. Many<unk>  structures, such as skin, eyes, fur and hair contain<unk> s (such as melanin) in specialized cells called chromatophores.<unk>  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<unk>  as well.
Biological pigment
Chemical substance
Metal
Biomolecule
Organic compound
Food additive
Nutrient
Flammable liquid