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Author Question: Contact of a sperm with signal molecules in the coat of an egg causes the sperm (Read 631 times) |
Did you know?
Stroke kills people from all ethnic backgrounds, but the people at highest risk for fatal strokes are: black men, black women, Asian men, white men, and white women.
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Amoebae are the simplest type of protozoans, and are characterized by a feeding and dividing trophozoite stage that moves by temporary extensions called pseudopodia or false feet.
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Eat fiber! A diet high in fiber can help lower cholesterol levels by as much as 10%.
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On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.
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During pregnancy, a woman is more likely to experience bleeding gums and nosebleeds caused by hormonal changes that increase blood flow to the mouth and nose.