Give me a riddle and i will awnser it
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Which are forms of nitrogen that are usable by humans

Which strategy is an example of how companies may upgrade themselves to meet changing customer preferences? a. doing door-to-door sellingb. using billboards to advertise the productsc. making online shopping services availabled. giving discounts on products

The organelle pictured is found in cells of and is theorized to have once been an independent organism.