Q: What is a group of similar ecosystems with the same general abiotic factors and primary producers? Choices: - ecoregion - family - taxon - biome A:
biome

Q: Birds have a flow-through respiratory system in which air flows unidirectionally from the posterior sacs into the lungs, then into these? Choices: - posterior bronchi - gills - alveoli - anterior air sacs A:
anterior air sacs

Q: What take the shape of their container, and are relatively easy to compress? Choices: - molecules - semi-fluids - fluids - gases A:
gases