Chapter 274 (1/2)

Seeing the colorful chameleon hiding behind the leaves, the tourists gradually dispersed to see other animals.

Da Wu looked at the half body of the chameleon exposed outside the leaves, touched his chin and thought, ”Hey, don't the chameleon change its color with the environment? Inside this exhibition box are brown trunks and green leaves. Why does its body turn red and yellow? I still have blue on my body. How did I change it? ”

Lin Hao shook his head in some doubt, indicating that he was not very clear.

There are relatively few popular science exhibition boards in the climbing hall, because there are a lot of animals here. Except for the key animals such as giant salamander, there is no specific exhibition board for each animal, that is, the pictures and origin of animals are attached below for a brief introduction.

The popular science exhibition board is usually at the corner of the corridor of the exhibition hall, which mainly introduces a certain kind of animals!

Lily's visit is more casual. Unlike the two people who have to take a look at the exhibition boxes one by one, she doesn't pay much attention to the ashy lizard and little turtle. She only appreciates the animals with high appearance and beautiful appearance for a long time.

At this time, he had come to the front, greeted them softly, and pointed to a display board in front of him: ”Hey, you see, here is an introduction to the reasons for the chameleon's color change!”

The exhibition raised two interesting questions at the beginning!

If you put a chameleon on a neon light that will change color continuously, will the chameleon change color continuously and finally die of exhaustion?

If you throw a handful of colorful rainbow candy at a chameleon, what color will it turn into?

Big Wudun was surprised: ”lying in the trough, is this a problem that people can think of? Chameleon lovers strongly condemn neon lights and rainbow candy! ”

Lin Hao also can't help but make complaints about it: ”chameleon said,” I may not be human, but you are real dog! ”

Instead of looking down at the reasons, I thought about it myself first.

The first question should be no, if you really want to change color and die, it's not tired or stupid.

Throw rainbow candy, is it a random color? Or constantly changing colors?

However, this idea was quickly rejected by him, because just now I saw an example of chameleon changing color. It was clear that the trunk and green leaves in the exhibition box turned red and yellow, which had nothing to do with the environment!

The exhibition board said that in the biological world, there are two sources of color formation, including pigment color and structural color!

Pigment color is the absorption and reflection of chemicals to some bands of visible light, while structural color is the color produced by the action of physical structure, such as the rainbow on the optical disc.

Early people believed that the color change of chameleon was due to the stimulation of the external environment, resulting in the change of the distribution of pigment cell particles on the body surface, and then the color change. But now research has found that many chameleons actually have no green pigment in their bodies.

So why does it look green? It is because there is a layer of rainbow cells under the pigment cells on the surface of the chameleon. The rainbow cells contain nano crystals arranged in a triangular grid, and this crystal is the key factor of color change.

When the chameleon is relaxed, the crystals in the rainbow cells are closely arranged to reflect blue light, which makes the chameleon look green through the skin containing yellow pigment.

When you are nervous, the spacing between crystals becomes wider, and the light segment with longer wavelength can be reflected, so that the chameleon's body color changes from yellow to red.

Therefore, the body color of chameleon in human eyes is intertwined with the chemical color of body surface cytochrome and the structural color formed by rainbow cell layer reflection.

Generally, only males have bright and striking colors in chameleons, and females are much inferior. This is because the rainbow cells in the upper layer of males are more developed.

Therefore, chameleon color change is mainly to express emotions and transmit signals, which is equivalent to the language of communication between them!

”I see!”