Answer: A: To track the length of user's illnesses over a specified period of time
Explanation:
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You can increase your awareness of hereditary diseases by discovering what chronic diseases your parents, grandparents, and other relatives have. By having this knowledge, you can often learn whether or not you have a disease, or might be a carrier. In some cases, certain diseases like Alzheimer's is hereditary, but doesn't show up until later in life. However, if your family has a tendency to have this disease, it is often very likely that you too will have it once you reach a certain age.
Answer: The aerobic energy system is used for prolonged endurance or exercise. Simply put the cell uses oxygen to burn glucose and make ATP i.e. aerobic production of energy by the oxygen system. Your muscles need a steady supply of ATP during any sustained activity.
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