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Author Question: In the first stage (pre-industrial) of the demographic transition model, birth rates and death rates ... (Read 64 times) |
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Autoimmune diseases occur when the immune system destroys its own healthy tissues. When this occurs, white blood cells cannot distinguish between pathogens and normal cells.
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On average, the stomach produces 2 L of hydrochloric acid per day.
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According to research, pregnant women tend to eat more if carrying a baby boy. Male fetuses may secrete a chemical that stimulates their mothers to step up her energy intake.
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Thyroid conditions cause a higher risk of fibromyalgia and chronic fatigue syndrome.
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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.