Question: Q: The frequency of a wave is the reciprocal of what other attribute of the wave? Read this paragraph and choose the correct option from the provided answers: The period of a wave and its frequency are reciprocals of each other. Choices: - amplitude - length - term - period A:
Answer: period

Question: Q: What causes food to move through the esophagus? Read this paragraph and choose the correct option from the provided answers: The esophagus is a narrow tube that carries food from the throat to the stomach. Food moves through the esophagus because of peristalsis. At the lower end of the esophagus, a circular muscle controls the opening to the stomach. The muscle relaxes to let food pass into the stomach. Then the muscle contracts again to prevent food from passing back into the esophagus. Choices: - photosynthesis - proteolysis - apoptosis - peristalsis A:
Answer: peristalsis

Question: Q: The amount of what entering the eyes helps control the biological clock? Read this paragraph and choose the correct option from the provided answers: In many species, including humans, circadian rhythms are controlled by a tiny structure called the biological clock . This structure is located in a gland at the base of the brain. The biological clock sends signals to the body. The signals cause regular changes in behavior and body processes. The amount of light entering the eyes helps control the biological clock. The clock causes changes that repeat every 24 hours. Choices: - air - energy - heat - light A:
Answer:
light