CHAPTER 15 OUTLINE If forest conservation is a balancing act then what factors are being balanced? 1. ecology, conservation 2. economy, human needs Why do we say that all plants are terrestrial? 1. seaweed, reclassification How did algae adapt to living on land? 1. dryness 2. protect the adult, protect the young What are the four stages of plant evolution? 1. bryophytes 2. vascular plants 3. seeds 4. flowers

2 Why is the Carboniferous period important to modern society? 1. liquid fossils 2. fuel How did gymnosperms adapt to a colder, drier climate? 1. seeds What is a seed? 1. life support system for embryo How are angiosperms more advanced than gymnosperms? 1. flowers 2. fruit 3. pollinator coevolution Why is preserving plant diversity important? 1. morals and ethics 2. economics 3. medicine