Ques:Answer the following question given this paragraph: The alchemists were never successful in changing lead into gold. But modern nuclear physics can accomplish this task. Lead is subjected to nuclear bombardment in a particle accelerator. A small amount of gold can be obtained by this process. However, the cost of the procedure is far more than the amount of gold obtained. So the dream of the alchemists has never (and will never) come true. Q: Which procedure helps modern nuclear physics convert lead into gold? Choices: - nuclear fission - matter fusion - evaporation - nuclear bombardment A:

Ans:nuclear bombardment
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Ques:Answer the following question given this paragraph: After birds lay their eggs, they generally keep the eggs warm with their body heat while the embryos inside continue to develop. This is called incubation, or brooding. In most species, parents stay together for at least the length of the breeding season. In some species, they stay together for life. By staying together, the males as well as females can incubate the eggs and later care for the hatchlings. Birds are the only nonhuman vertebrates with this level of male parental involvement. Q: What is another word for brooding- keeping eggs warm while the embryos develop? Choices: - spawning - fertilization - hibernation - incubation A:

Ans:incubation
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Ques:Answer the following question given this paragraph: The many steps in the process of aerobic cellular respiration can be divided into three stages. The first stage, glycolysis, produces ATP without oxygen. Because this part of the cellular respiration pathway is universal, biologists consider it the oldest segment. Note that glycogen and fats can also enter the glycolysis pathway. The second stage is the Krebs Cycle, and the third stage is the electron transport chain. It is during the third stage that chemiosmosis produces numerous ATP molecules. Q: Glycolysis, the krebs cycle, and the electron transport chain are stages in what process? Choices: - cell death - reproduction - mitosis - aerobic cellular respiration A:

Ans:aerobic cellular respiration
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Ques:Answer the following question given this paragraph: Coronary heart disease often does not have any symptoms. A symptom of coronary heart disease is chest pain. Occasional chest pain can happen during times of stress or physical activity. The pain of angina means the heart muscle fibers need more oxygen than they are getting. Most people with coronary heart disease often have no symptoms for many years until they have a heart attack. Q: The pain of angina means the heart muscle fibers need more what? Choices: - water - carbon - nitrogen - oxygen A:

Ans:
oxygen
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