Question

differentiate between Thallophyta and bryophyta

Answer 1

Division Thallophyta characterized by the presence of undifferentiated body with no distinctive stems, roots, and leaves. Hence, the body of these plants is called a thallus. Thallophytes do not have a vascular system, unlike the higher green plants. This division mainly includes the algae, which mainly exist in aquatic habitats and are capable of photosynthesis. Some examples of this division include Ulva, Cladophora, Spirogyra, Chara, etc. The sex organs of most thallophytes are unicellular. Thallophytes both sexual and asexual reproduction methods. The life cycle of thallophytes has two independent gametophytic and sporophyticgenerations. Asexual reproductionoccurs especially during unfavorable conditions through the spores called mitospores.Bryophytes are the most primitive green plants according to the latest classification of plant Kingdom. These plant bodies do not have true leaves, stems, roots or vascular system. Bryophytes include the mosses, liverworts, and hornworts. The body of these plants can grow up to 15 cm long. Mosses have rhizoids, which help to anchor and absorb nutrients. Bryophytes contain chlorophyll, and thus capable of photosynthesis. The life cycle of bryophytes has two generations; gametophyte and sporophyte. Bryophytes are usually found in moist terrestrial habitats because they need water to transport their sperms. Asexual reproduction is also seen.

Answer 2

Thallophyta

1. They are mostly aquatic.

2 The thallus consists of a single cell to well developed uniseriate or branched filaments.

3. There is no or ill defined tissue differenti­ation

4. In each cell one or few chloropasts are present. In other cases instead of chloroplasts, the chromatophores are present.

5. The stomata or pores are not present

Bryophyta

1. Mostly terrestrial and prefer damp and shady places.

2. The thalles is not filamentous except in protonema stage. It is made up of parenchymatous cells.

3. There is well defined tissue differenti­ation.

4. In each chlorophyllous cell many well developed chloroplasts are present.

5. The pores or stomata are present.