Q: Plants are complex organisms with tissues organized into what? Choices: - carbons - systems - families - organs A:
organs

Q: Arguably the most important ingredient in saliva for digestion is a type of what, which initiates the breakdown of carbohydrates? Choices: - amino - genes - fatty - enzyme A:
enzyme

Q: Which gas is responsible for global warming? Choices: - oxygen - hydrocarbons - ozone - carbon dioxide A:
carbon dioxide