Q: The anterior muscles of the neck facilitate swallowing and what else? Choices: - hearing - crying - perspiration - speech A:
speech

Q: Solar cells turn sunlight directly into what? Choices: - gas - water - cold - electricity A:
electricity

Q: Birds have evolved a respiratory system that enables them to fly. flying is a high-energy process and requires a lot of this? Choices: - weight - nitrogen - adaptation - oxygen A:
oxygen