Which unicellular organism reproduces asexually by budding?

1. Yeast is a unicellular fungus. 2. It forms two daughter nuclei by mitosis, then a small bulge (bud) appears on the surface. 3. One daughter nucleus enters the bud, which grows and separates as a daughter yeast. 4. Paramecium uses fission, Spirogyra fragments, and Planaria regenerates, so those are ruled out. _Source: Balbharati (Maharashtra Board) Class 10 Science & Technology Part 2, Ch 3 "Life Processes in Living Organisms Part 2", p.33_