| A | B |
|---|
| biodiversity | the variety of organisms that live in Earth's many ecosystems; the variety of plants and animals that live within a particular ecosystem |
| biome | a major land ecosystem having a distinct combination of plants and animals |
| deciduous forest | a biome that contains many trees and in which rainfall is moderate |
| desert | a biome in which plant life is not abundant and rainfall is low |
| endangered | in danger of becoming extinct |
| extinct | no longer living as a species |
| grassland | a biome containing many grasses but few trees and having low to moderate rainfall |
| taiga | a biome that contains many coniferous trees and in which rainfall is moderate |
| tropical rain forest | a biome distinguished by lush vegetation, abundant rainfall, and plentiful sunlight |
| tundra | a biome characterized by cold temperatures and low precipitation |
