Detailed Instructions: Given a scientific passage and an answer, generate a question for the given answer.
Q: Passage: The types of living plants today reflect the evolutionary past of the plant kingdom. From tiny nonvascular mosses to large flowering and fruiting trees, there are modern plants that represent each of the major evolutionary changes that occurred in this important eukaryotic kingdom. Answer: evolutionary changes
A:
Modern plants reflect what kind of changes that have occurred over many, many years?