Answer the following question given this paragraph: A certain mineral may form in different colors. Figure below shows four samples of quartz, including one that is colorless and one that is purple. The purple color comes from a tiny amount of iron. The iron in quartz is a chemical impurity. Iron is not normally found in quartz. Many minerals are colored by chemical impurities. Other factors can also affect a mineral's color. Weathering changes the surface of a mineral. Because color alone is unreliable, geologists rarely identify a mineral just on its color. To identify most minerals, they use several properties. Q: Where does the purple color in quartz come from? Choices: - aluminum - dirt - bronze - iron A:
iron
Answer the following question given this paragraph: Bees are beautiful creatures that help plants flourish. They carry pollen from one plant to another to facilitate plant growth and development. But, they can also be troublesome when they sting you. For people who are allergic to bee venom, this can be a serious, life-threatening problem. For the rest of us, it can be a painful experience. When stung by a bee, one first-aid treatment is to apply a paste of baking soda (sodium bicarbonate) to the stung area. This weak base helps with the itching and swelling that accompanies the bee sting. Q: What do bees carry from one plant to another to facilitate plant growth and development? Choices: - nutrients - spores - fungi - pollen A:
pollen
Q: Answer the following question given this paragraph: Pulmonary circulation is the part of the circulatory system that carries blood between the heart and lungs (the term pulmonary means "of the lungs"). It is illustrated in Figure below . Deoxygenated blood leaves the right ventricle through pulmonary arteries, which transport it to the lungs. In the lungs, the blood gives up carbon dioxide and picks up oxygen. The oxygenated blood then returns to the left atrium of the heart through pulmonary veins. Q: While in the lungs, blood gives up carbon dioxide and picks up what element before returning to the heart? Choices: - nitrogen - methane - hydrogen - oxygen A:
A: oxygen
Question: Answer the following question given this paragraph: Magma that cools underground forms intrusions ( Figure below ). Intrusions become land formations if they are exposed at the surface by erosion. Q: What does magma that cools underground form? Choices: - chambers - new crust - fluctuations - instrusions A:
Answer: instrusions
*Question*
Answer the following question given this paragraph: 25.5 Physiology of Urine Formation The entire volume of the blood is filtered through the kidneys about 300 times per day, and 99 percent of the water filtered is recovered. The GFR is influenced by hydrostatic pressure and colloid osmotic pressure. Under normal circumstances, hydrostatic pressure is significantly greater and filtration occurs. The hydrostatic pressure of the glomerulus depends on systemic blood pressure, autoregulatory mechanisms, sympathetic nervous activity, and paracrine hormones. The kidney can function normally under a wide range of blood pressures due to the autoregulatory nature of smooth muscle. Q: The entire volume of what is filtered through the kidneys about 300 times per day? Choices: - gastric juice - urine - saliva - blood A:
**Answer**
blood
Answer the following question given this paragraph: Q: The burning of what type of fuels is a major source of sulfur oxides and nitrogen oxides? Choices: - biofuels - renewable - synthetic - fossil A:
fossil