(Q).
Q: What play several important roles in the human body? Read this paragraph and choose the correct option from the provided answers: Lipids play several important roles in the body. Triglycerides are stored in fat cells until the body needs to break them down for chemical energy. These stored triglycerides also help insulate the body against extreme temperatures and cushion organs against physical jostling. Phospholipids and cholesterol are important constituents of the cell membrane. These compounds provide structural integrity to the cell wall, since they are not water-soluble. Other steroids are used as chemical messengers in the body, and the fat-soluble vitamins serve a variety of other functions. Choices: - cells - tissues - organs - lipids A:
(A).
lipids

(Q).
Q: What action, performed multiple times daily, is the single biggest use of water in the home? Read this paragraph and choose the correct option from the provided answers: It's easy to save water at home. If you save even a few gallons a day you can make a big difference over the long run. The best place to start saving water is in the bathroom. Toilet flushing is the single biggest use of water in the home. Showers and baths are the next biggest use. Follow the tips below to save water at home. Choices: - taking showers - watering plants - washing clothes - flushing the toilet A:
(A).
flushing the toilet

(Q).
Q: What are seamounts that rise above the water surface called? Read this paragraph and choose the correct option from the provided answers: A seamount is a volcanic mountain on the ocean floor. Seamounts that rise above the water surface are known as islands. There are many seamounts dotting the seafloor. Choices: - sandbars - coasts - reefs - islands A:
(A).
islands