Question

Stem and leaves of bryophyta plants are

• A. Analogous to stem and leaves of higher plants
• B. Homologous to stem and leaves of higher plants
• C. Both analogous and homologus
• D. None of the above

Answer 1

The correct option is A Analogous to stem and leaves of higher plants

Mosses generally have a well-defined shoot in the gametophyte generation. In early development, the plant may take a flattened form, suspiciously similar to the thallus of an alga or liverwort. More typically, the spore develops a long thread-like, recumbent growth, the protonema, which in turn buds off lateral caulonema which develop into stem-like gametophore structures on which the gametes will develop in a terminal gametangium. This structure typically has a well-developed pattern of leaves. It is referred to as a "stem" or "shoot" although it has no xylem or phloem and is therefore not really similar to an axis of a vascular plant. Rather than the xylem or phloem of tracheophytes, mosses have tissues made up of hydroid and leptoid cells. These are frequently referred to as "vascular tissues," and they do probably serve analogous functions.

Hence the correct option is A.