Range of thallus organisation in bryophytes
Answers
The thallus is sometimes one cell layer thick through most of its width (e.g., the liverwort Metzgeria) but may be many cell layers thick and have a complex tissue organization (e.g., the liverwort Marchantia). Branching of the thallus may be forked, regularly frondlike, digitate, or completely irregular.
The range of thallus variation is different in different bryophyte species.
EXPLANATION:
It may be a single layer of cells in some species whereas it may be a complex organisation of multiple layers of cells in some bryophytes. The branching of a bryophyte may be regularly frond like, digitate, or completely irregular. A thallus is a plant body which is differentiated into 'root', 'stem' and 'leaves' found on the gametophore in the case of bryophytes.