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The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.

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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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Asthma is the most common chronic childhood disease in the world. Most children who develop asthma have symptoms before they are 5 years old.

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Your chance of developing a kidney stone is 1 in 10. In recent years, approximately 3.7 million people in the United States were diagnosed with a kidney disease.

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Approximately 15–25% of recognized pregnancies end in miscarriage. However, many miscarriages often occur before a woman even knows she is pregnant.

Mendel's breeding program that produced a 9 : 3 : 3 : 1 ratio Mendel's breeding program that produced a 9 : 3 : 3 : 1 ratio
Waves in Deep and Shallow Water Waves in Deep and Shallow Water
Stripping is performed with deep pressure along the length of a muscle to its attachment. Parallel ... Stripping is performed with deep pressure along the length of a muscle to its attachment. Parallel ...
The hormone leptin is produced in fat cells, moves through the blood, and binds to receptors in the The hormone leptin is produced in fat cells, moves through the blood, and binds to receptors in the
Lymphocytes Migrating through Membranes Lymphocytes Migrating through Membranes
The K–T Boundary Layer The K–T Boundary Layer
Video: Chromosome structural organization/ Mechanisms for chromosome movement Animation

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