Q: What do structures of the human eye collect and focus? Read this paragraph and choose the correct option from the provided answers: The structures of the human eye collect and focus light. They form a reduced, upside-down image on the retina at the back of the eye. Choices: - sugars - air - electricity - light A:
light

Q: Scanning acoustic microscopes use what kind of waves to scan a specimen? Read this paragraph and choose the correct option from the provided answers: Scanning acoustic microscopes use sound waves to scan a specimen. These microscopes are useful in biology and medical research. Choices: - radio waves - heat waves - gamma waves - sound waves A:
sound waves

Q: Which process helps provide cleaner water for agriculture? Read this paragraph and choose the correct option from the provided answers: Fresh water is essential for good crops. In some areas of the world, there is enough rain to accomplish this task. In other locales, water must be provided so the crops will grow. Worldwide, irrigation covers about 18% of farm land and produces some 40% of crops. A major source of cleaner water in many parts of the world is provided by the process of desalinization . Choices: - purification - sterilization - osmosis - process of desalinization A:
process of desalinization