What is the importance of ivory?

What biome consist of forest floor undestory canopy and emergents? What are the four principles of risk classification? What three ecosystems are effected by the oil spill in the Gulf of Mexico? How long has Atlantic Humpback Dolphins been endangered? Why are the africans lungfish endangered? You heard that the panda is not a bear? How do ring tailed lemurs breathe? Is it possible for humans to communicate with wolves? What is a centroceras? Nutria Rats- are there attempts to control the growth or spread of this species what are the options what are the trade-offs of each of these options? How long was the albino peacock placed on the endangered species list? Do farmers like wolves? How did the saber tooth adapt? What is the oldest breed of horse besides the Przewalski's horse? How many species of animals are there in the Amazon rainforest? What do pandas spend most of their time doing? What are the invasive species of the Arctic tundra? What is being done to help preserve our river life? How many tigers are in Nashville zoo? Are there different breeds of manatees if so name them?