Q: Food chewed evenly during mastication moisten and lubricate the lining of the mouth and this? Choices: - esophagus - trachea - larynx - pharynx A:
pharynx

Q: When lactose is absent, a repressor protein binds to what? Choices: - differential - network - worker - operator A:
operator

Q: What kind of air does a continental polar air mass hold? Choices: - cool moist air - frigid wet air - warm dry air - cold dry air A:
cold dry air

Q: What term is used to describe the cellular structures responsible for protein synthesis? Choices: - chromosomes - chloroplasts - nuclei - ribosomes A:
ribosomes