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The first oncogene was discovered in 1970 and was termed SRC (pronounced "SARK").

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Adult head lice are gray, about ? inch long, and often have a tiny dot on their backs. A female can lay between 50 and 150 eggs within the several weeks that she is alive. They feed on human blood.

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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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More than one-third of adult Americans are obese. Diseases that kill the largest number of people annually, such as heart disease, cancer, diabetes, stroke, and hypertension, can be attributed to diet.

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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).

Development of the human brain. Development of the human brain.
Recently discovered species Tersicoccus phoenici under microscope Recently discovered species Tersicoccus phoenici under microscope
Crystal structure of human topoisomerase I in complex with a 22-bp DNA duplex Crystal structure of human topoisomerase I in complex with a 22-bp DNA duplex
Chart showing average yearly dose of radiation from natural and human-made sources Chart showing average yearly dose of radiation from natural and human-made sources
A human pedigree of the X-linked color-blindness trait A human pedigree of the X-linked color-blindness trait
Estimated times of divergence of human and Neanderthal genomic Estimated times of divergence of human and Neanderthal genomic
Video: Monohybrid crosses

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