Q: Tuna have been shown to contain high levels of what metal? Read this paragraph and choose the correct option from the provided answers: The higher up a food chain that humans eat, the greater the levels of toxic metals they take in. That's why people should avoid eating too much of large fish such as tuna. Tuna are predators near the top of their food chains. They have been shown to contain high levels of mercury. In people, heavy metals can damage the brain and other organs. Unborn babies and young children are most affected. That's because their organs are still developing. Choices: - cadmium - titanium - iron - mercury A:
mercury

Q: What force pulls objects toward the center of the earth? Read this paragraph and choose the correct option from the provided answers: Choices: - kinetic energy - centrifugal force - momentum - gravity A:
gravity

Q: What kind of radiation can be used to disrupt the dna-rna protein synthesis cycle that allows bacteria to reproduce? Read this paragraph and choose the correct option from the provided answers: Bacterial contamination in our food often makes the news. There are many bacteria present on raw food, especially raw meat. Campylobacter (pictured above), salmonella, and other microorganisms can be found, even after cooking if the meat has not been sufficiently exposed to the heat. Ionizing radiation can be used to disrupt the DNA-RNA-protein synthesis cycle that allows the bacteria to reproduce. Cobalt-60 is a common radiation source, as is cesium-137. But, just to be safe, order that burger well-done. Choices: - microwave - non-ionizing - infrared - ionizing A:
ionizing

Q: What are the simplest types of carbon-based compounds? Read this paragraph and choose the correct option from the provided answers: Hydrocarbons are compounds that contain only carbon and hydrogen. They are the simplest type of carbon-based compounds. Choices: - particles - Microbes - Cells - hydrocarbons A:
hydrocarbons