Question

Question :

Give the salient features of division Bryophyta with two examples.

​

Answer 1

❇QUESTION

Give the salient features of division Bryophyta with two examples.

✴ANSWER

The salient features of Bryophyta are:

• They grow in moist and shady places in the hilly areas.

• They lack true roots, stems and leaves.

• The plant body is thallus-like, prostate or erect.

E.g., Funaria, Sphagnum.

HOPE THIS ANSWER WILL HELP YOU!!

Answer 2

Answer:

General characterstics of division Bryophyta:

Special feature: The bryophytes are mostly terrestrial plants which depend on external water for fertilization and completion of their life cycle. Hence, they are called 'amphibian plants".

Rhizoids: Rhizoids are present instead of true roots. Rhizoids are unicellular in liverworts, while multicellular in mosses. Rhizoids absorb water and minerals. They also fix the plant to the substratum.

Vascular tissues: The vascular tissues are absent. However, in some bryophytes like mosses, a conducting strand of few thick-walled cells is present.

Habitat: Bryophytes generally grow in moist, cool and shady places such as moist walls, damp rocks, moist soil and on decaying legs.

Reproduction: Bryophytes reproduce by:

• a. vegetative means by tubers and gemmae.
• b. asexual reproduction by spore formation
• c. sexual reproduction by the formation of gametes.

Alternation of generations:

• The Bryophytes show two distinct generations, i.e. the gametophytic and the sporophytic generations.
• They alternate with each other to complete their life cycle. This is known as heteromorphic alternation of generations.
• The gametophyte is the dominant, green, haploid and independent phase; while sporophyte is diploid, recessive and partially dependent on gametophyte.
• Examples: Liverworts: e.g. Riccia, Marchantia; Hornworts: e.g. Anthoceros; Mosses: e.g. Funaria, Polytrichum.