Quiz: What is the significance of the Appalachian Mountains in ter December 26, 2024 by Bennett Ridge What is the significance of the Appalachian Mountains in terms of biodiversity? Discover more about Appalachian Tours at our home page. A) They host over 1,000 species of flowering plants and are a critical habitat for many rare and endangered species. B) They are home to the largest population of grizzly bears in the United States. C) They provide a migration route for millions of birds each year. D) They are the only mountain range in North America with a temperate rainforest ecosystem. Submit Answer