Answer:
The structure is haploid gametophyte (male and female gametophyte)
Step-by-step explanation:
Angiosperm is a seed-producing plant that is able to produce male and female gametophyte and with this they are able to carry out double fertilization. The pollen grains are formed by microspores (male gametophytes) and the ovule are formed by the megaspores (female gametophytes).