Final answer:
Saccharomyces cerevisiae can reproduce through budding in asexual reproduction and by fusing haploid cells in sexual reproduction, each method serving different genetic and environmental purposes.
Step-by-step explanation:
Saccharomyces cerevisiae, commonly referred to as yeast, can reproduce in two primary forms: asexual and sexual reproduction. In asexual reproduction, yeast cells undergo a process known as budding, where a new cell develops from a bulge on the original cell and eventually separates to form a new yeast cell. This is a quick method of reproduction that allows for rapid population growth. In sexual reproduction, yeast can undergo a process where two haploid cells (cells with half the normal number of chromosomes) fuse together through plasmogamy to form a diploid cell, which restores the normal chromosome number. This sexual form involves the use of mating factors for cell communication, similar to the signaling that occurs in multicellular organisms.