the root does the root does
The stem
stem the stem sticks straight.
Well it has very strong hold fasts (roots) to keep it firmly attached to the rock but it also has air filled bladders to help it keep afloat when the tide comes in
the leaves is the part of a land-plant that uses light to make food material
The cell wall, made of cellulose, keeps plant cells firm.
Because the root provides stability to the plant, and keeps it firmly in one area. The root also is the part of the plant by which water and nutrients are absorbed from soil - without these, the plant would die.
The pollen grain needs to land on the stigma of the plant for successful pollination to occur.
The same as a land plant, by photosynthesis.
Stigma
The stigma
stem
a spool pin