Q: Q: What is the long, narrow tube that carries food from the pharynx to the stomach by the mechanism of peristalsis? Choices: - gallbladder - liver - spinal cord - esophagus A:
A: esophagus

Q: Q: Does deforestation increase or decrease carbon dioxide levels around the world? Choices: - accelerate - eliminate - decrease - increase A:
A: increase

Q: Q: What substances are involved in most of the chemical reactions that take place in organisms, including digestion? Choices: - proteins - hormones - vitamins - enzymes A:
A: enzymes

Q: Q: The as yet undiscovered grand unified theory is a search to unify laws of what branch of science? Choices: - genetics - chemistry - masses - physics A:
A: physics