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Author Question: Gills are unsuitable for animals living on land because (Read 25 times) |
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The horizontal fraction bar was introduced by the Arabs.
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According to the Migraine Research Foundation, migraines are the third most prevalent illness in the world. Women are most affected (18%), followed by children of both sexes (10%), and men (6%).
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Although puberty usually occurs in the early teenage years, the world's youngest parents were two Chinese children who had their first baby when they were 8 and 9 years of age.
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Hyperthyroidism leads to an increased rate of metabolism and affects about 1% of women but only 0.1% of men. For most people, this increased metabolic rate causes the thyroid gland to become enlarged (known as a goiter).
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Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.