About microscopic forms of life, including Bacteria, Archea, protozoans, algae and fungi. Topics relating to viruses, viroids and prions also belong here.
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i just finished doing a lab about the effects of iron (III) oxide on the growth of yeast. i measured the respiration of the yeast (i attached balloons to the top of flasks), as well as the amount of foam they produced. after 3 hours, the yeast with no iron oxide added filled the balloon with the most air but the yeast with the most iron (20g) had the most foam. what would be a possible scientific explaination for these results? i don't understand why iron would cause more foam but less respiration overall.
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