Table of Contents
What is the division of Pteridophyta?
Ferns, horsetails (often treated as ferns), and lycophytes (clubmosses, spikemosses, and quillworts) are all pteridophytes….Pteridophyte.
| Pteridophyte Informal paraphyletic group of vascular plants that reproduce by spores | |
|---|---|
| Clade: | Tracheophytes |
| Division: | Pteridophyta |
| Includes: | |
| Lycopodiophyta Polypodiophyta |
What are the two divisions of pteridophytes?
Due to discovery of the fossil plants, the classification of Pteridophytes has undergone vast changes in the recent past. Older taxonomists divided the vascular plants in two divisions—Pteridophyta (primitive vascular plants with absence of seeds) and spermatophyta (presence of seeds).
How many divisions are there in pteridophytes?
(1952), the name of the division should end in the suffix-phyta, of a sub-division in-phytina and a class in -opsida. On this basis Wardlaw (1955) divided the Pteridophytes into four divisions: (1) Psilopsida: Sub-division Psilopsida (according to Wardlaw, 1955) or Division Psilophyta (according to Smith.
What are the characteristics of division Pteridophyta?
The general characteristics of Pteridophytes are:
- They are seedless.
- They are multicellular.
- They reproduce through spores.
- They are independent and free-living organisms.
- They have a well-differentiated plant body into root, stem and leaves.
What are the five subdivision of pteridophytes?
Classification of Pteridophytes
- Reimer (1954) proposed a classification for Pteridophytes. In this classification, the Pteridophytes are divided into five subdivisions.
- Psilophytopsida.
- Psilotopsida.
- Lycopsida.
- Sphenopsida.
- Pteropsida.
- There are 19 orders and.
- 48 families in the classification.
Which of the following division of pteridophyte is Homosporous?
Genera like Selaginella and Salvinia which produce two kinds of spores, macro (large) and micro (small) spores, are known as heterosporous pteridophytes Lycopodium and Equisetum are homosporous pteridophytes.
Which of the following division of pteridophytes is Homosporous?
The homosporous pteridophytes are the whisk ferns, Psilotum and Tmesipteris (Psilotophyta); the lycopods, Lycopodium sensu lato and Phylloglossum (class Aglossopsida of the Microphyllophyta); the horsetails and scouring rushes, Equisetum (Arthrophyta); and most families of ferns (Pteridophyta).
How do pteridophytes reproduce?
Pteridophytes are vascular plants. They reproduce by releasing sperms instead of seeds. The undersides of the fern leaf produce clusters of capsular structures known as sporangia when mature. It is in these structures that meiotic division occurs, forming the haploid (n) spores.
Which pteridophyte is called as horse tail?
Equisetum is a genus of ferns commonly known as the ‘horse-tails’ because the branched species somewhat resemble a horse’s tail. They consist of 15 species of considerably unique plants from the class of ferns known as Equisetopsida.
Who is father of pteridophytes?
More than 20 years ago, Edward Klekowski (1979), who can validly be called the father of modern studies on pteridophyte genetics, published a summary and synthesis of the unique features of homosporous pteridophytes.
What is mean by H * * * * * * * * * * and heterosporous pteridophytes give two examples?
⭐. HOMOSPOROUS PETRIDOPHYTES : The plants which produce only one kind of spores called homosporous pteridophytes. Ex: psilotum. ⭐.HETEROSPOROUS PTERIDOPHYTES : The plants which produce two kinds of spore on the same plant are these type. Ex : salvinia.
Does pteridophytes need water for reproduction?
The sporophyte is a typical vascular plant drawing soil water through true roots. Hence, although bryophytes and pteridophytes both grow on soil and require water for fertilization, only bryophytes are called amphibians of plant kingdom.
Which Pteridophyte is called as a hostel?
So, the correct answer is option ‘Equisetum’.
Which Pteridophyte is known as water fern?
Salvinia molesta
Salvinia molesta, or giant water fern.
Are pteridophytes Monoecious or dioecious?
The homosporous pteridophytes form monoecious prothallus whereas the heterosporous pteridophytes form the dioecious prothallus.
How does reproduction occur in pteridophytes?
Almost all pteridophytes reproduce through sexual mode of reproduction which includes meiosis and fertilization. Through meiosis, pteridophytes produce spores wherein they have an equal number of chromosomes from the parent.
How do pteridophytes display differentiation?
Pteridophytes display differentiation. The plant body can be divided into true root, stem, and leaves. A saprophyte is the main plant body here. Some of the species belonging to this division have small leaves called the microphylls. For example, Selaginella.
What is the classification of pteridophytes?
Due to discovery of the fossil plants, the classification of Pteridophytes has undergone vast changes in the recent past. Older taxonomists divided the vascular plants in two divisions—Pteridophyta (primitive vascular plants with absence of seeds) and spermatophyta (presence of seeds).
What is the life cycle of Pteridophyta?
Pteridophytas and other plants have a life cycle called alternation of generations (also known as metagenesis ). Following is the classification of the Pteridophyta: These are the earliest vascular plants to be discovered. The majority of them are now extinct. Psilotum and Tmesipteris are the only two surviving species left.
Why do pteridophytes have a dependence on water?
Ans: Pteridophytes have a dependence on water. Reproduction and fusion of gametes can happen in the presence of water. In humid and damp conditions, fertilization occurs effectively and the reproduction is more. Hence they can proliferate more.