Complex sentence: The diploid cells (the preferential'form' of yeast) similarly undergo a simple lifecycle of mitosis and growth, but under conditions of stress can undergo sporulation, entering meiosis and producing four haploid spores, which can subsequently mate.
Split into simpler sentences: The diploid cells (the preferential'form' of yeast) similarly undergo a simple lifecycle of mitosis and growth. Under conditions of stress, diploid cells can undergo sporulation, entering meiosis and producing four haploid spores, which can subsequently mate.