* Being multicellular eukaryotes: They have complex cells with membrane-bound organelles, including a nucleus containing DNA.
* Being autotrophic: They produce their own food through photosynthesis, using sunlight, carbon dioxide, and water.
* Having cell walls made of cellulose: This provides structural support and protection.
* Possessing a life cycle that includes alternation of generations: They alternate between a haploid (gametophyte) and a diploid (sporophyte) stage.
The kingdom Plantae includes:
* Mosses, liverworts, and hornworts: These are non-vascular plants, meaning they lack a specialized system for transporting water and nutrients.
* Ferns and their relatives: These are vascular plants with a complex system of roots, stems, and leaves.
* Gymnosperms: These are seed-bearing plants that do not produce flowers, such as conifers (pine, fir, spruce) and cycads.
* Angiosperms: These are flowering plants that produce seeds enclosed within a fruit.
Note: The classification of organisms is constantly being revised and debated. Some scientists may use different systems and include groups like algae or fungi within the kingdom Plantae.
