Answer the following question given this paragraph: The second line of defense attacks pathogens that manage to enter the body. It includes the inflammatory response and phagocytosis by nonspecific leukocytes. Q: This bodily defense function attacks pathogens and includes inflammatory response and phagocytosis? Choices: - first line of defense - third line of defense - vomitting - second line of defense A:
second line of defense

Answer the following question given this paragraph: Metals such as iron are useful for many purposes because of their unique properties. For example, they can conduct electricity and bend without breaking. However, pure metals may be less useful than mixtures of metals with other elements. For example, adding a little carbon to iron makes it much stronger. This mixture is called steel. Steel is so strong that it can hold up huge bridges, like the one pictured above. Steel is also used to make skyscrapers, cargo ships, cars, and trains. Steel is an example of an alloy. Q: Adding carbon to iron makes what type of metal? Choices: - ions - titanium - plastic - steel A:
steel

Answer the following question given this paragraph: The lymphatic system consists of organs, vessels, and lymph. Q: Organs, vessels, and lymph make up what system? Choices: - digestive - circulatory - nervous - lymphatic A:
lymphatic