Pascale Jacques December 4, 2019 Animal
In addition to affecting our mood, emotions and actions, color also affects the ambiance of a space as well as how big or small, coldly or warmly it is perceived. Colors are the most commonly used tool by children to express their emotions and thoughts. Although the preferences of children show a general commonality based on age group, their color choices can differ based on their moods, the way they express themselves and their feelings.
When color is transmitted from the eye to the brain, the brain releases a hormone affecting the emotions, mind clarity and energy levels. The negative and positive psychological effects of colors can be observed in human beings based on the combinations they are used in. While babies feel unsettled in a room of mainly yellow, they can feel peaceful and calm in a room painted in a combination of blue, green and yellow.
luciferin is catalysed by the enzyme luciferase to react with oxygen, releasing light. Comb jellies such as Euplokamis are bioluminescent, creating blue and green light, especially when stressed; when disturbed, they secrete an ink which luminesces in the same
Advertising coloration can signal the services an animal offers to other animals. These may be of the same species, as in sexual selection, or of different species, as in cleaning symbiosis. Signals, which often combine color and movement, may be understood by many different species; for example, the cleaning stations of the banded coral shrimp Stenopus hispidus are visited by different species of fish, and even by reptiles such as hawksbill sea turtles.
Mimicry means that one species of animal resembles another species closely enough to deceive predators. To evolve, the mimicked species must have warning coloration, because appearing to be bitter-tasting or dangerous gives natural selection something to work on. Once a species has a slight, chance, resemblance to a warning colored species, natural selection can drive its colors and patterns towards more perfect mimicry. There are numerous possible mechanisms, of which by far the best known are:
Some animals are colored purely incidentally because their blood contains pigments. For example, amphibians like the olm that live in caves may be largely colorless as color has no function in that environment, but they show some red because of the haem pigment in their red blood cells, needed to carry oxygen. They also have a little orange colored riboflavin in their skin. Human albinos and people with fair skin have a similar color for the same reason.
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