Q: Q: What do obligate aerobes need to live? Choices: - blood - acid - dioxide - oxygen A:
A: oxygen

Q: Q: Modern plants reflect what kind of changes that have occurred over many, many years? Choices: - unknown changes - tissue changes - tendency changes - evolutionary changes A:
A: evolutionary changes

Q: Q: Sound is the transfer of energy from a vibrating object in waves that travel through what? Choices: - light - time - water - matter A:
A: matter

Q: Q: What are mid-wavelength electromagnetic waves commonly referred to as? Choices: - gamma rays - x-rays - electricity - light A:
A: light