Q: While some climate regions have multiple layers, arid regions are poor for development of what? Choices: - rain - plants - minerals - soil A:
soil

Q: A pulley changes the direction of the force t exerted by the cord without changing its what? Choices: - longitude - latitude - position - magnitude A:
magnitude

Q: How many different amino acids make up proteins. Choices: - 14 - 25 - 30 - 20 A:
20