Chapter 274

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!"

After reading the exhibition card, Lin Hao suddenly realized.

Think about the problem mentioned at the beginning of the exhibition board. Neon lights change color. The chameleon lying on it just keeps green and indifferent?

It is estimated that the colorful chameleon just now was nervous by tourists, so it turned red and yellow and hid behind the leaves.

After understanding this knowledge, look back at the previous colorful chameleon exhibition box.

The tourists dispersed and climbed out from behind the leaves to restore the quiet blue-green.

Lin Hao had a wonderful feeling in his heart. Just now he just appreciated its rainbow appearance, and now he can suddenly feel its mood.

It can really be said that it is an animal that likes to look angry!

I couldn't help saying to Dawu, "actually, I wasn't particularly interested in reptiles before I came to visit today. I thought they were cold and boring, but now my impression has changed a little. It seems very interesting to see them! I kind of want to have a chameleon. "

Da Wu said with a smile, "yes! In particular, the environment of the exhibition hall is great. I think it's very interesting to see anything in such a beautiful exhibition hall. "

Lizards, turtles, chameleons, frogs, snakes and other animals in various environments are mixed. After all, they don't look very different in the eyes of ordinary tourists. If a type is only raised in one area, you will feel visual fatigue when you stroll around.

In this way, you can try to maintain a fresh visiting experience.

Strolling around, Lin Hao was attracted by the snake in a large exhibition box.

There are rich layers of green vegetation in the exhibition box. At the bottom are some bright green mosses and ferns. On the back wall, there are Ficus pumila climbing. There are a few drops of glistening dew on the leaves. It looks like it has just rained, and a sense of moisture comes to my face.

It's like intercepting a corner of the tropical rain forest in the exhibition box!

Several sunken trees are placed with a sense of shape. On a horizontal trunk slightly higher than the tourists' line of sight, there is a lump of green Python wrapped around it.

It is not so much winding as drooping. It is in the shape of two layers of "U" nested outward. The head is placed in the middle of the word "U", and you can't see where the tail is.

In the white eyes, there is a thin black line, which should be the pupil of the green tree python. It looks like it is about to break. It doesn't move and sleeps.

On the neatly arranged small scales, there are some crystal clear water drops, which are green and dripping like the tender bamboo that has just been drenched in the rain. It's very beautiful!

"What a beautiful snake!"

Lin Hao was amazed again and bent over to look at the label below.

Green tree python, native to Australia and other places, arboreal small Python!

Adults generally do not exceed 1 M 8.

A family of three passed by. The little boy stared at the green tree python and said happily, "Ma Ma, look, this snake is so beautiful!"

Mother was afraid and took her father's hand: "Oh, don't let me see snakes. I can't see snakes. I'm scared to death."

Lin Hao enjoyed it for a while. Seeing that the green tree python was sleeping soundly, he didn't move, and continued to see other animals.