C6H12O6 (glucose) + O2 (oxygen) -> CO2 (carbon dioxide) + H2O (water) + sunlight energy (ATP). The reaction is called cellular respiration and it is used in plants and animals to break down sugars into usable energy to complete bodily functions.
B- yeast is used for baking things, it helps the dough rise in bread and pizzas etc
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Sinlge-celled organisms and soft, boneless animals. Back then organisms were single-celled and simple.
