Unit 6 : Lesson 1. Classifying Plants. Plant origins….
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The ancestors of all plants are believed to be similar to the plant-like protists, green algae. Algae is unicellular or multicellular, with no roots, stems or leaves. Because they live in water, algae do not need sophisticated transport systems, either. All of that changed when plants moved from water to land!
In this lesson, you will follow the evolutionary adaptations of plants as they moved onto land. You will see how plants were able to exploit more diverse environments by developing a vascular system, seeds, and ultimately, flowers & fruit.