A Scientist Is Designing an Experiment to Test a Bacterium's

Short Answer

A scientist is designing an experiment to test a bacterium's ability to use carbon sources other than glucose for nourishment.She inoculates four different flasks with samples of the bacterium and observes whether the bacteria grow.All of the flasks contain minimal media plus a carbon source.The carbon source is glucose in flask A, arabinose in flask B, galactose in flask C, and lactose in flask D.Flask A is a _______ in this experiment.