(Question)
Q: What is the radula made mostly of?    Choices:  - casein  - chlorophyll  - schist  - chitin  A:
(Answer)
chitin


(Question)
Q: In this type of reaction, an element replaces another element in a compound, and the element is in any state of matter but is not an ion?    Choices:  - double-replacement reaction  - replication reaction  - polar reaction  - single-replacement reaction  A:
(Answer)
single-replacement reaction


(Question)
Q: What substances function as a long-term energy store in the human body and possess long carbon chains that prevent dissolving in water?    Choices:  - hydrocarbons  - steroids  - nanoparticles  - triglycerides  A:
(Answer)

triglycerides