Q: Tuna have been shown to contain high levels of what metal? Choices: - cadmium - titanium - iron - mercury A:
mercury

Q: What force pulls objects toward the center of the earth? 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? Choices: - microwave - non-ionizing - infrared - ionizing A:
ionizing

Q: What are the simplest types of carbon-based compounds? Choices: - particles - Microbes - Cells - hydrocarbons A:
hydrocarbons