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According to http://www.atlasobscura.com/articles/whatever-you-do-do-not-eat-touch-or-even-inhale-the-air-around-the-manchineel-tree, it evolved to be poisonous to discourage animals from digging into it. Here's one possible way that could have happened. It was once only a tiny speck more poisonous than other trees by random fluctuations in toxicity. By ...


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There has only been little research on the neurocognitive and neurophysiological effects of cannabis. There have been introductory neuroimaging studies in mainly non-psychotic populations, which show that cannabis does not affect gross brain anatomy. On the other hand however, it has been proved that cannabis does acutely increase cerebral blood flow (...


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Usually, toxicity is given in the units of mass of the substance per unit mass of body mass of the organism that will kill 50% of the organisms in a species if those organisms ingest the toxin at that dose (e.g. mg/kg, ng/kg). This measurement is called the median lethal dose, and is often abbreviated as LD50. In your table, they only provide the mass of ...



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