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In 1835 it was discovered that a disease of silkworms known as muscardine could be transferred from one silkworm to another, and was caused by a fungus.

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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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Approximately one in four people diagnosed with diabetes will develop foot problems. Of these, about one-third will require lower extremity amputation.

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Adults are resistant to the bacterium that causes Botulism. These bacteria thrive in honey – therefore, honey should never be given to infants since their immune systems are not yet resistant.

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According to the CDC, approximately 31.7% of the U.S. population has high low-density lipoprotein (LDL) or "bad cholesterol" levels.

Glaucoma. (a) A buildup of pressure within the eye cavities, often caused by a blockage of vessels t Glaucoma. (a) A buildup of pressure within the eye cavities, often caused by a blockage of vessels t
Steric effects caused by ligand binding to the heme of myoglobin Steric effects caused by ligand binding to the heme of myoglobin
Spinal changes caused by osteoporosis. Spinal changes caused by osteoporosis.
Uticaria, a skin rash caused by type I hypersensitivity. Uticaria, a skin rash caused by type I hypersensitivity.
Muscle weakness caused by myasthenia gravis is evident in the eyes of this patient. Muscle weakness caused by myasthenia gravis is evident in the eyes of this patient.
Crown gall disease caused by Agrobacterium via plant transformation Crown gall disease caused by Agrobacterium via plant transformation
Video: Mendel's pea plant, Pisum sativum experimental

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