What grows inside the structure pictured below?
Gametophytes
Flagellated sperm
Sporophytes
Anthers

Gametophytes grow inside the given picture. It is the erotic phase in the alternation of generations in the life cycle of plants and algae.
Gametophytes may be defined as one of the two alternating multicellular stages in the life cycles of plants and algae.
The stage other than gametophyte is called sporophyte which is a non-erotic phase. Gametophyte is a haploid multicellular organism that usually develops from haploid spore. It possess a single set of chromosome.
Therefore, gametophytes grow inside the given picture. It is the erotic phase in the alternation of generations in the life cycle of plants and algae.
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