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mass extinction event of 65 million years ago, in which about 85% of all species on Earth died out. This extinction marked the disappearance of the dinosaurs.
anaerobic respiration that occurs in plants and results in the formation of ethanol and carbon...
a form of environmentally-friendly farming in which farmland and soil are cared for so that it...
the inner body tissue layer that forms the gut and other internal organs.
nutrients are obtained by digesting organic compounds that have to be acquired and ingested by...