Final answer:
Microevolution is the evolutionary changes within a species' population, while macroevolution refers to larger-scale evolutionary changes at or above the species level over many generations.
Step-by-step explanation:
The statement that microevolution refers to large-scale changes that occur in organisms at above species' level is false. Microevolution actually describes the evolutionary changes that occur within a population, affecting its allele frequencies over time. This is in contrast to macroevolution, which refers to changes that occur at or above the level of species over many generations, often observable in the fossil record and leading to the emergence of new species.
For example, microevolution can be observed in the changes in beak shapes of Darwin's finches over a relatively short period, often as a result of natural selection or genetic drift within a population. Conversely, macroevolution encompasses large-scale evolutionary changes like the diversification of mammals after the extinction of the dinosaurs, which happens over geologic time spans.