Problem 1: What characteristics does the kingdom Protista share with other kingdoms?
Problem 2: Why are protists so difficult to classify?
Problem 3: What observable traits do green algae and plants share that suggest that they have a common ancestor?
Problem 4: What characteristics do fungi share with animals? What does this tell you about their common ancestry?
Problem 5: What characteristics do fungi share with plants? What does this tell you about their common ancestry?
Problem 6: What adaptations allowed plants to thrive on dry land?