Question

21 multiple choice 1 point under normal living conditions, yeast is a diploid a zygote a cell undergoing meiosis a haploid

Explanation:

Yeast (Saccharomyces cerevisiae, for example) under normal, favorable living conditions (like nutrient - rich environments) exists as a haploid. Haploid yeast cells can grow and reproduce asexually (through budding). Diploidy in yeast usually occurs under specific conditions (like nutrient limitation, which triggers sexual reproduction - fusion of haploid cells to form a diploid zygote, and then meiosis can occur in the diploid phase under stress). A zygote is a diploid cell formed by the fusion of two haploid gametes, and yeast isn't typically a zygote under normal living conditions. Meiosis is a specialized cell division process for producing haploid cells from diploid cells, and yeast cells don't undergo meiosis under normal living conditions (meiosis in yeast is triggered by stress and occurs in the diploid phase). So, under normal living conditions, yeast is a haploid.

Answer:

a haploid