such as swine, cattle, chickens, and horses were reared mostly outdoors, since the advent of confined growth and production of these animals in confinements housing hundreds of animals, the incidence, threat and spread of disease has increased astronomically. the negative effects of disease are magnified...
greater concerns. biological pigments in biology, a pigment is any coloured material of plant or animal cells. many biological structures, such as skin, eyes, fur and hair contain pigments (such as melanin). animal skin coloration is often achieved with specialized cells called chromatophores, which in animals...