25. When talking about biodiversity, the term "hotspots" refers to areas that have a lot of A. pollution B. global warming C. endemic species D. endangered species 26. A biologist is searching for a new plant-based antibiotic. In which of the following types of ecosystems w the biologist have the best chance of finding new kinds of plants to use in her research (which is the most biodiverse area of the options below)? A. highland desert B. temperate deciduous forest C. polar tundra D. tropical rainforest 27. The wetland plant purple loosestrife was imported to North America from Europe. Since its introductic loosestrife has spread, which has resulted in a dramatic decline in the biological diversity of native wetlan and harmed the wetland ecosystem. A likely reason for the spread of the purple loosestrife is that it can A. successfully compete with native herbivores for food B. serves as an excellent food source for native herbivores C. successfully out competes with native plants for space D. prevent the migration of native plants

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