What is the life cycle of pteridophytes?
The life cycle of pteridophytes is a continuous reproductive process that is dominated by the sporophyte (sexual) stage of the alternation of generations. Fern spores are catapulted into the air, and the spores develop into heart-shaped haploid gametophytes that contain both male and female sex organs.
What type of life cycle is followed by pteridophytes?
Bryophytes and pteridophytes show haplo-diplontic life cycle, i.e. alternation of generation between gametophyte, which is haploid and sporophyte, which is diploid.
What are the main features of pteridophytes?
- Pteridophytes are considered as the first plants to be evolved on land:
- They are cryptogams, seedless and vascular:
- The plant body has true roots, stem and leaves:
- Spores develop in sporangia:
- Sporangia are produced in groups on sporophylls:
- Sex organs are multicellular:
How many are associated with pteridophytes?
More than 12000 species of pteridophytes are found on Earth.
Why pteridophytes are called soil binders?
Pteridophytes are used for medicinal purposes and as soil-binders. Pteridophytes are first terrestrial plants possess vascular tissues- xylem and phloem. …
How do Pteridophytes reproduce?
The pteridophytes reproduce sexually through spores. The sporophyte of pteridophytes carries the sporangia which will burst open once the spores are matured. These mature spores germinate to form a gametophyte.
How are pteridophytes are classified?
Hint: A pteridophyte is a free-sporing vascular plant with xylem and phloem. On the basis of nature and relation of leaf and stem vascular anatomy and position of sporangia, they are classified into four main classes – Psilopsida, Lycopsida, Sphenopsida and Pteropsida.
What is the importance of pteridophytes?
Pteridophytes commonly known as Vascular Cryptogams, are the seedless vascular plants that evolved after bryophytes. Besides being a lower plant, pteridophytes are economically very important. Dry fronds of many ferns are used as a cattle feed. Pteridophytes are also used as a medicine.