Plants can be categorized into two main types: vascular and non-vascular plants. Vascular plants, like trees and flowers, have specialized tissues that transport water and nutrients throughout the plant. This allows them to grow taller and thrive in various environments. They also reproduce using seeds or spores. On the other hand, non-vascular plants, such as mosses and liverworts, lack these specialized tissues. They are usually smaller and grow in moist areas. Non-vascular plants absorb water and nutrients directly through their surfaces, making them essential for ecosystems, as they help retain moisture and provide habitats for small organisms.