Answer the following question given this paragraph: Q: Why are the stems of many xerophytes fleshy? Choices: - drains water - pressures water - collects water - stores water A:
stores water

Answer the following question given this paragraph: Minerals are chemical elements that don't come from living things or include the element carbon. Many minerals are needed in the diet for normal functioning of the body. Several minerals that are needed in relatively large amounts are listed in Table below . As you can see from these examples, minerals have a diversity of important functions. Your body can't produce any of the minerals it needs, so you must get them from the food you eat. The table shows good food sources of the minerals. Q: What is the name for elements that neither contain carbon nor come from living things? Choices: - acids - contaminants - pigments - minerals A:
minerals

Answer the following question given this paragraph: The walls of the ventricle are lined with trabeculae carneae, ridges of cardiac muscle covered by endocardium. In addition to these muscular ridges, a band of cardiac muscle, also covered by endocardium, known as the moderator band (see Figure 19.9) reinforces the thin walls of the right ventricle and plays a crucial role in cardiac conduction. It arises from the inferior portion of the interventricular septum and crosses the interior space of the right ventricle to connect with the inferior papillary muscle. When the right ventricle contracts, it ejects blood into the pulmonary trunk, which branches into the left and right pulmonary arteries that carry it to each lung. The superior surface of the right ventricle begins to taper as it approaches the pulmonary trunk. At the base of the pulmonary trunk is the pulmonary semilunar valve that prevents backflow from the pulmonary trunk. Q: What reinforces the thin walls of the right ventricle and plays a crucial role in cardiac conduction? Choices: - pores band - moderator valve - pores valve - moderator band A:
moderator band

Answer the following question given this paragraph: During World War II, battleships and submarines carried echo sounders. Their goal was to locate enemy submarines ( Figure below ). Echo sounders produce sound waves that travel outward in all directions. The sound waves bounce off the nearest object and then return to the ship. Scientists know the speed of sound in seawater. They then can calculate the distance to the object that the sound wave hit. Most of these sound waves did not hit submarines. They instead were used to map the ocean floor. Q: What produces sound waves that travel outward in all directions in water? Choices: - echo chamber - ultrasound machines - amplifiers - echo sounders A:
echo sounders