Vital water
All plants need water. Most plants soak it up form the grounds, then draw it up thorough their steam and use it to make sugar. Water pressure inside a soft-stemmed plants holds it up, so if it runs out of water , the plants wilts and collapses. Woody stems that do not wilt, and collapse. But many plants have strong, woody stems that do not wilt, and their strength allows the biggest trees to spread their leaves high above ground level.
Types of plants
There are two main grounds of plants. Non-vascular plants, such as mosses, were the first plants to evolve. Unlike vascular plants, they do have internet vein system that allow water and sap to flow all arounds the plant.
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