Question

In hepaticae/liverworts of bryophytes, the majority is
A. Flattened thallus
B. Foliose
C. Discoids
D. Rosette

Answer 1

Hint: Bryophytes are belonging to the kingdom Plantae (Gr. byron means mosses and python means plants). They are connecting links between algae and pteridophytes. They are small multicellular green, land plants. They are also known as amphibians of the plant kingdom. The lack of vascular tissues to conduct moisture and nutrients throughout the plant limits them to a small size.

Complete answer:
The non-vascular plants are collectively known as the Bryophytes, divided into liverworts, hornworts and mosses. They exist in a wide variety of habitats. They can be found growing in moist and shaded areas. They can also grow where vascularized (bearing vascular tissues) plants cannot because they do not depend on roots for absorbing nutrients from soil. They can survive on rock and bare soil.
Liverworts (hepaticae) are land plants that do not have a vascular system. They usually grow in wet or moist and shaded places. They lack true leaves, roots and stems. They have root like, stem like and leaf-like structure. Their plant body is thalloid just like algae but there thallus is much more advanced as compared to algae. The thallus is dorsiventral and closely attached to the substratum with the help of a root like structure called rhizoids.

The liverworts are fall into two groups based on their growth form:-
-The thalloid or thallose liverworts- They look like green ribbons that grow flat against a surface. This part of the plant is called the thallus. There are no clearly distinct roots, stems or leaves. Example: Marchantia.
-The leafy or scaly liverworts-They may resemble mosses or very tiny ferns. They have flattened stems with tiny and overlapping, leaf-like scales arranged in two rows on stem-like structures. Example: Plagiochila.

Hence, the correct answer is option (A).

Note: Mosses are small, non-vascular spore-bearing land plants. They are distributed throughout the world and are commonly found in moist shady locations. They consist of small branched stems with spirally arranged simple leaves. Example: Sphagnum, Funaria and polytrichum.