Answer:
Gametes
Step-by-step explanation:
The given plant has a haploid plant body. Haploid gamete mother cells undergo mitosis and form haploid gametes. The gametes should be fused together to give rise to a diploid zygote. The diploid zygote then undergoes meiosis and gives rise to the haploid plant body.
The haploid plant body bears haploid gamete mother cells and the process continues. The given plant exhibits zygotic meiosis and forms gametes by mitosis.