Write the characteristics of the plants belonging to division Thallophyta, Bryophyta and pteridophyta.
Answers
Answer:
Hope this helps you.
Explanation:
The characteristics of bryophytes are-
∙ They are the first plants to live on land, but require moist conditions to survive. For this reason, they are called 'the amphibians of plant kingdom'.
∙ They are non-vascular, i.e., they do not have specialized vascular tissues (xylem and phloem) for the conduction of water and food.
∙ They lack true roots, stem, and leaves. But, they show more body differentiation than thallophytes.
∙ They have rhizoids instead of true roots.
∙ They do not bear flowers and seeds.
∙ They reproduce both sexually as well as asexually.
∙ Bryophytes exhibits 'alternation of generations' in which the gametophytic phase (haploid) alternates with the sporophytic phase (diploid).
∙ Examples of bryophytes: Riccia, Marchantia, Funaria
This is for Thallophyta.
Characteristics of Thallophyta
They are usually found in moist or wet places.
This is due to the absence of “true roots” and vascular tissue that is needed to transport water and minerals. Hence they are found in moist or wet places.
They are autotrophic in nature.
Most members of this group manufacture their own food. But a few members like fungi are dependent on other sources of food.,
Reserve food is generally starch.
After photosynthesis, glucose is produced and consumed almost immediately, the remaining glucose is converted into complex compounds called starch.
They have a cell wall composed of cellulose around their cells.
Absence of vascular tissue.
Unlike other plants, xylem and phloem are absent. etc
Sex organs are simple, single-celled, there is no embryo formation after fertilization.
So this is for Pteridophyta.Pteridophyta Characteristics
1. Pteridophytes are considered as the first plants to be evolved on land:
It is speculated that life began in the oceans, and through millions of years of evolution, life slowly adapted on to dry land. And among the first of the plants to truly live on land were the Pteridophytes.
2. They are cryptogams, seedless and vascular:
Pteridophytes are seedless, and they reproduce through spores. They contain vascular tissues but lack xylem vessels and phloem companion cells.
3. The plant body has true roots, stem and leaves:
They have well-differentiated plant body into root, stem and leaves.
4. Spores develop in sporangia:
The sporangium is the structures in which spores are formed. They are usually homosporous (meaning: one type of spore is produced) and are also heterosporous, (meaning: two kinds of spores are produced.)
Read More: Sporulation
5. Sporangia are produced in groups on sporophylls:
Leaves that bear the sporangia are termed as sporophylls. The tip of the leaves tends to curl inwards to protect the vulnerable growing parts.
6. Sex organs are multicellular:
The male sex organs are called antheridia, while the female sex organs are called archegonia.
7. They show true alternation of generations:
The sporophyte generation and the gametophyte generation are observed in Pteridophytes. The diploid sporophyte is the main plant body.
Thank you guys
- These are autotrophic.
- They don't have any stem or root means the absent of root and stem.
- Thallophyta is classified into two sub groups : Algae & fungi.
- Bryophyta are known as the amphibians of the plant kingdom.
- In plant belonging to bryophyta have no specialised tissues fot the conduction of water and other substances.
- Examples of plants belonging to bryophyta are : moss and marchantia.
- Pteridophyta are said to be first plants which are evolved on the land.
- These are seedless because they don't have any seeds.
- Sex organs are multicellular in these division of plant pteridophyta.