AP BIOLOGY

Detailed explanation-1: -In contrast to temperate forest and temperate grassland biomes, desert biomes tend to have thin, sandy, less-fertile soil. Deserts tend to be hot and dry, so few organisms live there.

Detailed explanation-2: -Tundra is the coldest of all the biomes. Tundra comes from the Finnish word tunturi, meaning treeless plain. It is noted for its frost-molded landscapes, extremely low temperatures, little precipitation, poor nutrients, and short growing seasons.

Detailed explanation-3: -Deforestation and fragmentation, over-exploitation, invasive species and climate change are the main drivers of tropical forest biodiversity loss.

Detailed explanation-4: -This vast untamed wilderness is under increasing threat from huge-scale farming and ranching, infrastructure and urban development, unsustainable logging, mining and climate change.