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Coca-Cola originally used coca leaves and caffeine from the African kola nut. It was advertised as a therapeutic agent and "pickerupper." Eventually, its formulation was changed, and the coca leaves were removed because of the effects of regulation on cocaine-related products.

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Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.

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Since 1988, the CDC has reported a 99% reduction in bacterial meningitis caused by Haemophilus influenzae, due to the introduction of the vaccine against it.

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Lower drug doses for elderly patients should be used first, with titrations of the dose as tolerated to prevent unwanted drug-related pharmacodynamic effects.

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Most fungi that pathogenically affect humans live in soil. If a person is not healthy, has an open wound, or is immunocompromised, a fungal infection can be very aggressive.

The eukaryotic cell cycle and cell division in an organism with six chromosomes. The eukaryotic cell cycle and cell division in an organism with six chromosomes.
Degree of genetic relatedness to self in a diploid organism. Degree of genetic relatedness to self in a diploid organism.
The threespine stickleback (Gasterosteus aculeatus) has been used as a model organism for the study The threespine stickleback (Gasterosteus aculeatus) has been used as a model organism for the study
A transgenic organism A transgenic organism
The developing organism senses maternally transmitted environmental cues The developing organism senses maternally transmitted environmental cues
An organism has alleles R1 and R2 on one pair of homologous chromosomes, and it has alleles T1 ... An organism has alleles R1 and R2 on one pair of homologous chromosomes, and it has alleles T1 ...
Video: Digestive System Animation

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