Which of the following is an important characteristic of the Galápagos Islands in the context of Darwin's theory of evolution?1. The islands were too far from mainland South America for most terrestrial plants and animals to colonize.2. The organisms on the islands were different from those observed in South America.3. The organisms on the islands were similar to those observed in South America.4. The organisms on the islands varied from island to island.5. All of the above answers are important characteristics.