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mass extinction event of 250 million years ago, in which about 90% of all species on Earth died out. It included a mass extinction of insects.
a bone cell.
causing the opposite effect.
anaerobic respiration that occurs in plants and results in the formation of ethanol and carbon...
neurons that have two outgrowths coming directly from the cell body.
a serious eating disorder in which sufferers starve themselves voluntarily owing to extreme...