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Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.
Drug abusers experience the following scenario: The pleasure given by their drug (or drugs) of choice is so strong that it is difficult to eradicate even after years of staying away from the substances involved. Certain triggers may cause a drug abuser to relapse. Research shows that long-term drug abuse results in significant changes in brain function that persist long after an individual stops using drugs. It is most important to realize that the same is true of not just illegal substances but alcohol and tobacco as well.
The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.
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.
Throughout history, plants containing cardiac steroids have been used as heart drugs and as poisons (e.g., in arrows used in combat), emetics, and diuretics.
![Richard Wrangham’s “female-bonded” theory of intergroup competition was highly influential in our un](https://biology-forums.com/gallery/47/medium_269691_26_01_15_5_57_42_204562031.jpeg)
![A child in an orphanage in Juba, Sudan. The treatment of this child is likely to affect his ability ...](https://biology-forums.com/gallery/47/medium_660365_19_12_16_11_52_41_24332671.png)