Q: Birds are the most numerous type of what vertebrates? Choices: - arachnipod - amphipod - ornithopod - tetrapod A:
tetrapod

Q: What is the name for a material that prevents the transfer of heat energy? Choices: - physical insulator - structure insulator - thermal condenser - thermal insulator A:
thermal insulator

Q: What is the body system that digests food mechanically and chemically and absorbs nutrients? Choices: - metabolism system - internal system - ingestion system - digestive system A:
digestive system