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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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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In 1864, the first barbiturate (barbituric acid) was synthesized.
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Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.
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When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.
Tweed Water Spaniel
Water caltrop
How to plot a cosine function containing an amplitude and phase-shift (Question 1 of 2)
A good disinfecting solution you can make yourself consists of 1 part bleach to 10 parts water.
A membrane permeable to water but not to glucose (C6H12O6) separates two aqueous solutions. ...