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Fungal nail infections account for up to 30% of all skin infections. They affect 5% of the general population—mostly people over the age of 70.

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Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.

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The longest a person has survived after a heart transplant is 24 years.

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During the twentieth century, a variant of the metric system was used in Russia and France in which the base unit of mass was the tonne. Instead of kilograms, this system used millitonnes (mt).

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Serum cholesterol testing in adults is recommended every 1 to 5 years. People with diabetes and a family history of high cholesterol should be tested even more frequently.

Origins of replication in the chromosomes of different organisms Origins of replication in the chromosomes of different organisms
A map of the 12 tomato chromosomes A map of the 12 tomato chromosomes
pair of homologous chromosomes pair of homologous chromosomes
Mitotic human chromosomes in metaphase Mitotic human chromosomes in metaphase
Anaphase Centromeres split and daughter chromosomes migrate to opposite poles Anaphase Centromeres split and daughter chromosomes migrate to opposite poles
Human mitotic metaphase chromosomes are identified by size, centromere location, and banding pattern Human mitotic metaphase chromosomes are identified by size, centromere location, and banding pattern
Video: Elementary kinetics

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