The antheridia and archegonia of a fern are located on the prothallus, which is heart-shaped. The prothallus is anchored to the soil by rhizoids.
a structure is something that holds up
DNA
cdellulose
Centromeres.
The cell membrane holds a cell together.
Yes a Retainer wall is a structure, that holds back earth.
The cell wall
HISTONE PROTEINS
DNA
Chromozome
Centromere.
ciliary body