PBIO 1030 Exam 4 Thompson| 255 Questions| With Complete Solutions

State the estimates of diversity in the U.S. and Canada and in Mexico and explain what is meant by biodiversity hotspots correct answer: Encompasses 15% of the planet's total land area -Biodiversity hotspots: specific areas around the globe with particularly high concentrations of species that have experienced habitat loss Describe how human activities have led to losses of biodiversity and identify the leading contributor correct answer: Human settlement and farming have led to destruction of natural area (deforestation and urbanization) -leading contributor is climate change Describe the extent of biodiversity loss among plants and conservation efforts. Explain whether these efforts are successful. correct answer: 1/3 of plant species are threatened into extinction -some species receive special conservation status -37% of plants are federally protected in U.S. Distinguish between in situ and ex situ conservation and explain how they are connected. Define reintroduction. correct answer: Ex situ: move seeds to new location and preserving the seeds In situ: protected areas to conserve plants with the reintroduction of native species Explain the benefits of biodiversity correct answer: -Provides food and shelter -Purifies air and water -Stabilizes Earth's climate