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Author Question: Which form of transport requires the expenditure of energy? (Read 17 times) |
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The people with the highest levels of LDL are Mexican American males and non-Hispanic black females.
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Only 12 hours after an egg cell is fertilized by a sperm cell, the egg cell starts to divide. As it continues to divide, it moves along the fallopian tube toward the uterus at about 1 inch per day.
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About 600,000 particles of skin are shed every hour by each human. If you live to age 70 years, you have shed 105 pounds of dead skin.
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More than 2,500 barbiturates have been synthesized. At the height of their popularity, about 50 were marketed for human use.
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The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.