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Did you know?

More than nineteen million Americans carry the factor V gene that causes blood clots, pulmonary embolism, and heart disease.

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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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Each year in the United States, there are approximately six million pregnancies. This means that at any one time, about 4% of women in the United States are pregnant.

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According to research, pregnant women tend to eat more if carrying a baby boy. Male fetuses may secrete a chemical that stimulates their mothers to step up her energy intake.

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The average human gut is home to perhaps 500 to 1,000 different species of bacteria.

The nitrogen cycle. Numbers represent fluxes as 1012 g N per year (data from Schlesinger 1991, after The nitrogen cycle. Numbers represent fluxes as 1012 g N per year (data from Schlesinger 1991, after
Pocket gophers and ecosystem structure (data from Huntly and Inouye 1988). Pocket gophers and ecosystem structure (data from Huntly and Inouye 1988).
The growth in demand for energy use is met by burning fossil fuels The growth in demand for energy use is met by burning fossil fuels
data data
Satellite data showing net primary production. Productivity is coded as red (highest) down through o Satellite data showing net primary production. Productivity is coded as red (highest) down through o
Sturtevant’s Recombination Data for Five X-Linked Genes in Drosophila Sturtevant’s Recombination Data for Five X-Linked Genes in Drosophila
Video: Gastrin (gastric emptying) & Secretin (buffering gastric acid)

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