As part of their research on cell reproduction, ms. kelly's biology class designed various experiments to determine the best conditions for budding, or asexual reproduction, in common yeast cells. one group of students placed yeast in a test tube with warm water and table sugar as a source of food. they used a light microscope to observe the yeast cells. one student noted that after the cells grew for a while, a bud formed. ms. kelly asked approximately how large the yeast cells were when they began budding. which is the most likely unit for measuring the size of a typical mature yeast cell?