Q: Q: One of the main features all vetebrates have in common is what? Choices: - hard shell - brain - skeleton - backbone A:
A: backbone

Q: Q: Like a runner passing a baton, the transmission of nerve impulses between neurons depends on what? Choices: - enzymes - axons - receptors - neurotransmitters A:
A: neurotransmitters

Q: Q: What compounds, which serve as fuels and are used in manufacturing, are called the driving force of western civilization? Choices: - forests - fossils - gas - hydrocarbons A:
A: hydrocarbons

Q: Q: Like the strings of cello, anything that vibrates produces waves of what? Choices: - heating - light - sound - energy A:
A: energy