Answer the following question given this paragraph: Mutagenesis may occur spontaneously or be induced. A spontaneous mutation can just happen. These mutations are not caused by an environmental factor, but occur during normal cellular processes. A spontaneous mutation may be due to a mistake during DNA replication or transcription. Mutations may also occur during mitosis and meiosis. A mutation caused by an environmental factor, or mutagen , is known as an induced mutation . Typical mutagens include chemicals, like those inhaled while smoking, and radiation, such as X-rays, ultraviolet light, and nuclear radiation. Table below lists some spontaneous mutations that are common. Q: Induced mutations are caused by environmental factors. what term is used to describe a mutation that has no environmental cause? Choices: - cancerous mutation - evident mutation - numerous mutation - spontaneous mutation A:
spontaneous mutation

Answer the following question given this paragraph: All matter is composed of extremely small particles called atoms. Q: What are the extremely small particles that comprise all matter? Choices: - ions - protons - electrons - atoms A:
atoms

Answer the following question given this paragraph: A combustion engine is a complex machine that burns fuel to produce thermal energy and then uses the energy to do work. In a car, the engine does the work of providing kinetic energy that turns the wheels. The combustion engine in a car is a type of engine called an internal combustion engine. (Another type of combustion engine is an external combustion engine. ). Q: What is the name of the type of combustion engine that you would find in a car? Choices: - internal oxide engine - internal vapor engine - internal modern engine - internal combustion engine A:
internal combustion engine

Answer the following question given this paragraph: Carbon cycles quickly between organisms and the atmosphere. Cellular respiration releases carbon into the atmosphere as carbon dioxide. Carbon is also released when organisms decompose. Human actions, such as the burning of fossil fuels, also release carbon into the atmosphere. Natural processes, such as volcanic eruptions, release carbon from magma into the atmosphere. Warm ocean waters also release carbon, whereas cold ocean water dissolves carbon from the atmosphere. Photosynthesis (autotrophs) removes carbon dioxide from the atmosphere and uses it to make organic compounds. Carbon cycles far more slowly through geological processes such as sedimentation. Runoff, rivers and streams dissolve carbon in rocks and carry it to the ocean. Sediments from dead organisms may form fossil fuels or carbon-containing rocks. Carbon may be stored in sedimentary rock for millions of years. Q: How long can carbon be stored in sedimentary rock? Choices: - around 10,000 years - less than 1000 years - 22 weeks - millions of years A:
millions of years