1、 The result of evolution

1. We all know that the water shortage of the plant is due to the pores on the surface of the leaves, which will take away a lot of water during transpiration. However, the leaves of the cactus plant have long become needles, so there will be no evaporation of water. At this point, the water content of the plant can be retained to maintain life activities

2. Another important reason is that the surface layer of the plant is strongly keratinized, like a layer of wax, and the pores are sunken. In this way, the water of the plant will be deeply locked in the cells. Sometimes the water stored by itself can reach 95% of its own weight, which shows that it is possible to maintain life in the desert

2、 Own advantages

1. When it comes to its own advantages, it refers to the root of the plant, which has a strong ability to absorb water. Even the water in the air can be collected for its own use to a certain extent

2. If the plant is short of water and there is no water in the depth of the root system, it will continue to extend until the water source is found again, so the plant can grow in such a harsh environment