Q: What kind of diseases involve the immune system accidentally attacking healthy body cells? Read this paragraph and choose the correct option from the provided answers: Autoimmune diseases occur when the immune system fails to recognize the body's own molecules as "self," or belonging to the person. Instead, it attacks body cells as though they were dangerous pathogens. Some relatively common autoimmune diseases are listed in Table below . These diseases cannot be cured, although they can be treated to relieve symptoms and prevent some of the long-term damage they cause. Choices: - contagious diseases - metabolic - inflammation - autoimmune A:
autoimmune
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Q: Deeper layers of rock must be older than layers closer to the surface, this is the law of what? Read this paragraph and choose the correct option from the provided answers: Superposition refers to the position of rock layers and their relative ages ( Figure below ). Relative age means age in comparison with other rocks, either younger or older. The relative ages of rocks are important for understanding Earth's history. New rock layers are always deposited on top of existing rock layers. Therefore, deeper layers must be older than layers closer to the surface. This is the law of superposition. Choices: - erosion - diffraction - flux - superposition A:
superposition
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Q: Water behind a dam has potential energy. moving water, such as in a waterfall or a rapidly flowing river, has this? Read this paragraph and choose the correct option from the provided answers: Figure 6.6 Water behind a dam has potential energy. Moving water, such as in a waterfall or a rapidly flowing river, has kinetic energy. (credit "dam": modification of work by "Pascal"/Flickr; credit "waterfall": modification of work by Frank Gualtieri). Choices: - residual energy - thermal energy - compression energy - kinetic energy A:
kinetic energy
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Q: What gas can be generated by reacting sodium bromide with elemental chlorine? Read this paragraph and choose the correct option from the provided answers: Elemental bromine gas can be generated by reacting sodium bromide with elemental chlorine. The other product is sodium chloride. Write a balanced chemical equation for this reaction. Saylor URL: http://www. saylor. org/books. Choices: - Molecular Bromine Gas - photons bromine gas - gaseous bromine gas - elemental bromine gas A:
elemental bromine gas
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