PLEASE HELP You must design a valid experiment to show that there are microorganisms in the air. What would be your dependent va
riable? (Points : 2) sterilized broth growth of organisms in the broth exposure to microorganisms in the air You must design a valid experiment to show that there are microorganisms in the air. What would be your control group? (Points : 2) open flask with unsterilized broth open flask with sterilized broth sealed flask with unsterilized broth sealed flask with sterilized broth
You can carry out a test , 1- take a sample of the air in a test tube 2-add limewater to the test tube 3- result : if it turns milky/cloudy it has microorganisms 4- reason: because every microorganism respires , and so it produces Carbon dioxide . and limewater is the test to show the presence of Carbon dioxide .
