Mosses, ferns, and lichens are bryophytes. They are non-vascular and non-flowering plant and have a thallus-like body. They reproduce by production f spores, inside the sporangia, and connceted to a base called as sporangiophore, which attaches it to the thallus.
There are 6 molecules of O2.
"O2" is the formula for one molecule oxygen, which has 2 atoms.
The subscript (small) "2" tells you how many atoms are in the molecule.
The coefficient is the big number tells you the number of molecules.
In 6O2, there are 12 atoms in total (6 molecules of 2 atoms each).
The cells that decides how thw plant take shape and function is the meristem cells
