Final answer:
Budding yeasts designate the site of new bud formation during cell division by secreting a mating factor signaling molecule that binds to cell-surface receptors in nearby yeast cells and triggers a cell signaling cascade.
Step-by-step explanation:
The process by which a budding yeast cell designates the site of new bud formation during cell division involves signaling through a molecule called mating factor. Budding yeasts secrete this signaling molecule, which binds to cell-surface receptors in nearby yeast cells. This binding initiates a cell signaling cascade, including protein kinases and GTP-binding proteins, which ultimately leads to the cessation of normal growth cycles and the initiation of bud formation.