Definition
*Chlorophyta* refers to a division of green algae. These are photosynthetic eukaryotes that contain chlorophylls a and b. Most *Chlorophyta* are found in freshwater or marine environments. They range from single-celled organisms to large, multicellular seaweeds. *Chlorophyta* play a significant role in aquatic ecosystems as primary producers. Think of them as the 'grass of the sea,' providing energy for many other organisms. They represent a key group in the evolution of plants.