A list of the contents of this article:

What is the spike of a cactus?

1. Answer: the spike of cactus is its leaf, which is formed by the degradation of the plant to adapt to the hot and arid desert environment.

2. Answer: the thorn of cactus is its leaf, just to adapt to the degradation of desert environment. There is an extreme shortage of water in the desert, and all plants have strong drought resistance and water storage capacity. Turning the leaves into spikes reduces the volatilization of water and allows the roots to take root better.

3. The thorns of cactus are actually its leaves. The thorn of cactus is the deformation of its leaves, which is a degradation in order to adapt to the desert environment. In the desert, water is extremely scarce, and all plants must have strong drought resistance and water storage capacity.

4. The thorn is its organ, and the leaf is born under the thorn. When the leaves fall off, new leaves no longer grow at the leaves, but the thorns do not fall off. Branches that are more than two years old have only thorns but no leaves. On the new palm of a cactus, the leaves evolve into short, spiny leaves that also grow under the thorns.

What is the thorn of the cactus?

The thorn of the cactus is its leaf, just to adapt to the degradation of the desert environment. There is an extreme shortage of water in the desert, and all plants have strong drought resistance and water storage capacity. Turning the leaves into spikes reduces the volatilization of water and allows the roots to take root better.

The desert environment is dry and short of water. In order to adapt to this harsh condition, the leaves of cactus degenerate into thorns, which can reduce transpiration and thus reduce water consumption. Therefore, the thorn of cactus is formed by the degeneration of its leaves. The correct answer is: C.

The answer is c. Cactus lives in arid desert, its stem is fleshy and can store a lot of water; leaf abnormal thorns reduce the surface area of leaves, reduce the transpiration of cactus, and help to maintain water, so as to adapt to the environment of drought and water shortage in the desert.

The thorn is its organ, and the leaf grows under the thorn. When the leaves fall off, new leaves no longer grow at the leaves, but the thorns do not fall off. Branches that are more than two years old have only thorns but no leaves. On the new palm of a cactus, the leaves evolve into short, spiny leaves that also grow under the thorns.

The thorn of the cactus, in fact, is its leaves, which is caused by the change in appearance (in order to adapt to the environment in order to survive, after long-term evolution). Primitive cactus plants have leaves. They were originally distributed in less arid areas, and their appearance is not much different from that of ordinary plants.

The cactus belongs to the cactus family, which is a tufted succulent shrub that can grow to 5-3 meters high. Its branches are broadly Obovate or Obovate oval, green to turquoise in color, and glabrous. The thorns on the branches are yellow, with beige stripes, and are very hard.

[science knowledge hidden bag for parents] Why is the cactus stabbed?

1. For example, many hares, mice or wild boars will choose the cactus near the bottom to eat, because the bottom of the cactus is relatively old, and the thorns may have been worn or lost, unlike the new cactus at the top. Small animals can still eat cactus successfully as long as they carefully avoid a few remaining thorns.

2, the cactus suitable growth temperature is between 15-30 degrees Celsius, more than 35 degrees Celsius, less than 10 degrees Celsius, the cactus will enter a dormant period, and below 0 degrees Celsius, the cactus may have frostbite.