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Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.

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People with alcoholism are at a much greater risk of malnutrition than are other people and usually exhibit low levels of most vitamins (especially folic acid). This is because alcohol often takes the place of 50% of their daily intake of calories, with little nutritional value contained in it.

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Though the United States has largely rejected the metric system, it is used for currency, as in 100 pennies = 1 dollar. Previously, the British currency system was used, with measurements such as 12 pence to the shilling, and 20 shillings to the pound.

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The lipid bilayer is made of phospholipids. They are arranged in a double layer because one of their ends is attracted to water while the other is repelled by water.

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Atropine was named after the Greek goddess Atropos, the oldest and ugliest of the three sisters known as the Fates, who controlled the destiny of men.

Ghostly experiment Ghostly experiment
Millikan Oil-Drop Experiment – Experimental Set-Up Millikan Oil-Drop Experiment – Experimental Set-Up
Use a vacuum or fuel line hose over the spark plug to install it without danger of cross-threading ... Use a vacuum or fuel line hose over the spark plug to install it without danger of cross-threading ...
A typical two-line cleaning machine hookup, showing an extension hose that can be used to squirt a ... A typical two-line cleaning machine hookup, showing an extension hose that can be used to squirt a ...
A Schematic Representation of the Flawed Predator Experiment A Schematic Representation of the Flawed Predator Experiment
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Video: The life cycle of protein

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