Ques: Q: What three primary colors of light can be distinguished by the human eye? Read this paragraph and choose the correct option from the provided answers: The human eye can distinguish only red, green, and blue light. These three colors are the primary colors of light. All other colors of light can be created by combining the primary colors. Secondary colors of lightcyan, yellow, and magentaform when two primary colors combine equally. Choices: - blue, red, orange - yellow, green, blue - red, green, yellow - red, green, blue A:
Ans: red, green, blue

Ques: Q: How many watts equals a horse power? Read this paragraph and choose the correct option from the provided answers: Sometimes power is measured in a unit called the horsepower. For example, the power of car engines is usually expressed in horsepowers. One horsepower is the amount of work a horse can do in 1 minute. It equals 745 watts of power. Compare the horsepowers in the Figure below to the other Figure below . Choices: - 695 - 904 - 375 - 745 A:
Ans: 745

Ques: Q: What are the blood vessels that carry blood toward the heart and tend to have thinner walls? Read this paragraph and choose the correct option from the provided answers: Veins are blood vessels that carry blood toward the heart. This blood is no longer under pressure, so veins have thinner walls. To keep the blood moving, many veins have valves that prevent the backflow of blood. Veins generally carry oxygen-poor blood. The smallest veins are called venules. They merge to form larger and larger veins. The largest vein is the inferior vena cava, which carries blood from the lower body directly to the heart. Choices: - capillaries - glands - clots - veins A:
Ans: veins

Ques: Q: Historically, malaria has rivaled what as the leading cause of human death by infectious disease? Read this paragraph and choose the correct option from the provided answers: Alloys can be one of two general types. In one type, called a substitutional alloy, the various atoms simply replace each other in the crystal structure. In another type, called an interstitial alloy, the smaller atoms such as carbon fit in between the larger atoms in the crystal packing arrangement. Choices: - heart attack - hepatitis - cancer - tuberculosis A:
Ans:
tuberculosis