Pteridophyte NCERT Biology
Characteristics, Classification, Life Cycle & NEET Notes
📚 Quick Summary
Pteridophyte NCERT Biology is an important topic from the Class 11 Biology chapter Plant Kingdom. Pteridophytes are seedless vascular plants that possess well-differentiated roots, stems and leaves.
They include familiar groups such as ferns, horsetails and club mosses. Unlike bryophytes, pteridophytes have a well-developed vascular system containing xylem and phloem.
For NEET Biology, pay special attention to their vascular tissues, dominant sporophyte, spores, heterospory and the alternation of generations.
Pteridophyte NCERT Biology: Introduction
Pteridophyte NCERT Biology deals with seedless vascular plants that occupy an important position in the evolution of land plants. Pteridophytes are more advanced than bryophytes because their plant body is differentiated into true roots, stems and leaves and contains vascular tissues.
They reproduce through spores rather than seeds. The sporophyte is the dominant and independent phase of the life cycle.
🎯 NEET Biology Focus
- Pteridophytes are seedless vascular plants.
- The sporophyte is dominant.
- They possess true roots, stems and leaves.
- They reproduce through spores.
- Water is generally required for fertilisation.
- Some pteridophytes are heterosporous.
1. General Characteristics of Pteridophytes
- Pteridophytes are vascular cryptogams.
- They have well-developed vascular tissues such as xylem and phloem.
- The plant body is differentiated into true roots, stems and leaves.
- The dominant phase is the sporophyte.
- The sporophyte is generally independent and photosynthetic.
- They do not produce flowers, fruits or seeds.
- They reproduce by producing spores.
- The gametophyte is usually small and free-living.
- Fertilisation requires water because the male gametes are motile.
Pteridophytes = Vascular + Seedless + Sporophyte dominant + Spore-producing
2. Classification of Pteridophytes
According to the traditional classification used in school-level botany, pteridophytes include several important groups.
| Group | Examples |
|---|---|
| Psilopsida | Psilotum |
| Lycopsida | Lycopodium, Selaginella |
| Sphenopsida | Equisetum |
| Pteropsida | Ferns such as Pteris |
3. Dominant Sporophyte
The main plant body of a pteridophyte is the sporophyte. It is diploid and possesses differentiated roots, stems and leaves.
The sporophyte produces spores through structures called sporangia.
In many ferns, sporangia occur in groups called sori, usually found on the underside of leaves.
Pteridophyte → Dominant generation = Sporophyte
4. Spore Formation
Pteridophytes reproduce through spores. The sporangia produce spores through meiosis.
When a spore germinates, it develops into a small gametophyte known as the prothallus in many ferns.
The gametophyte produces male and female sex organs and participates in sexual reproduction.
5. Gametophyte in Pteridophytes
The gametophytic phase is much smaller than the sporophyte. In many pteridophytes, it is a small, free-living and photosynthetic structure.
The gametophyte bears:
- Antheridia – male sex organs
- Archegonia – female sex organs
The antheridia produce male gametes, while the archegonia contain the egg.
6. Fertilisation in Pteridophytes
Water is essential for fertilisation in most pteridophytes. The multiflagellate male gametes swim through a film of water towards the archegonium.
Fusion of the male and female gametes produces a diploid zygote.
The zygote develops into the young sporophyte.
Bryophytes and pteridophytes both require water for fertilisation.
7. Homospory
Many pteridophytes are homosporous. They produce only one type of spore.
The spores generally develop into bisexual gametophytes under suitable conditions.
Examples of homosporous pteridophytes include Lycopodium and many ferns.
8. Heterospory
Some pteridophytes produce two different types of spores. This condition is called heterospory.
- Microspores – produce male gametophytes.
- Megaspores – produce female gametophytes.
Important heterosporous pteridophytes include Selaginella and Salvinia.
🌱 Heterospory: Important NEET Concept
Heterospory is considered an important step toward the evolution of the seed habit.
Selaginella + Salvinia → Heterosporous pteridophytes
9. Life Cycle of Pteridophytes
Pteridophytes show alternation of generations between the diploid sporophyte and haploid gametophyte.
Sporophyte → Sporangia → Spores → Gametophyte → Antheridia & Archegonia → Fertilisation → Zygote → Young Sporophyte
Important Sequence
- The dominant sporophyte produces sporangia.
- Sporangia produce spores through meiosis.
- Spores germinate into gametophytes.
- Gametophytes produce antheridia and archegonia.
- Fertilisation produces a zygote.
- The zygote develops into a new sporophyte.
10. Important Pteridophyte Examples
| Pteridophyte | Important Point |
|---|---|
| Lycopodium | Homosporous pteridophyte |
| Selaginella | Heterosporous |
| Equisetum | Horsetail |
| Pteris | Fern |
| Salvinia | Heterosporous water fern |
11. Bryophytes vs Pteridophytes
| Feature | Bryophytes | Pteridophytes |
|---|---|---|
| Vascular tissue | Absent | Present |
| Dominant phase | Gametophyte | Sporophyte |
| True roots, stems and leaves | Absent | Present |
| Reproduction | Spores | Spores |
| Water for fertilisation | Required | Required |
12. Importance of Pteridophytes
- They are important components of many forest and moist ecosystems.
- They contribute to soil formation and ecological succession.
- Some ferns are cultivated as ornamental plants.
- Some pteridophytes have medicinal and economic importance.
- They are important for understanding the evolution of vascular land plants.
13. NEET Biology MCQs on Pteridophytes
1. Pteridophytes are:
A. Seed-bearing vascular plants
B. Non-vascular plants
C. Seedless vascular plants
D. Flowering plants
✅ Answer: C. Seedless vascular plants
2. The dominant generation in pteridophytes is:
A. Gametophyte
B. Sporophyte
C. Zygote
D. Embryo
✅ Answer: B. Sporophyte
3. Which pteridophyte is heterosporous?
A. Lycopodium
B. Selaginella
C. Funaria
D. Marchantia
✅ Answer: B. Selaginella
4. Heterospory involves the production of:
A. One type of spore
B. Two types of spores
C. Seeds only
D. Pollen grains only
✅ Answer: B. Two types of spores
5. Microspores generally develop into:
A. Female gametophytes
B. Male gametophytes
C. Sporophytes
D. Zygotes
✅ Answer: B. Male gametophytes
6. Megaspores generally develop into:
A. Male gametophytes
B. Female gametophytes
C. Sporophytes directly
D. Sporangia
✅ Answer: B. Female gametophytes
7. Which tissue is characteristic of vascular plants?
A. Xylem and phloem
B. Epidermis only
C. Collenchyma only
D. Parenchyma only
✅ Answer: A. Xylem and phloem
8. Water is required for fertilisation in pteridophytes because:
A. Eggs are released into water
B. Male gametes are motile
C. Spores are aquatic
D. Seeds need water
✅ Answer: B. Male gametes are motile
📌 Pteridophytes: One-Minute NEET Revision
Nature: Seedless vascular plants
Vascular tissues: Xylem and phloem
Dominant generation: Sporophyte
Reproduction: Spores
Male sex organ: Antheridium
Female sex organ: Archegonium
Fertilisation: Requires water
Heterosporous examples: Selaginella and Salvinia
Homosporous example: Lycopodium
Important fern example: Pteris
🧠Super NEET Memory Tricks
Pteridophytes → Vascular but Seedless
Dominant → Sporophyte
Selaginella + Salvinia → Heterospory
Microspore → Male | Megaspore → Female
Water → Fertilisation
🌿 NEET Biology for Odisha Students
Students preparing for NEET in Odisha can use these NCERT-based Pteridophyte notes for quick revision of the Plant Kingdom chapter. Focus on the differences between bryophytes and pteridophytes, important examples, heterospory and the dominant generation.
For students from Cuttack, Bhubaneswar, Puri, Sambalpur and other parts of Odisha, combining NCERT reading with chapter-wise MCQ practice can make Plant Kingdom revision more systematic.
Explore NEET Biology for Odisha Students →📖 Related Plant Kingdom Notes
🎯 Final NEET Takeaway
For Pteridophyte NCERT Biology, remember the central concept:
Pteridophytes → Seedless vascular plants → Sporophyte dominant → Spores → Gametophyte → Water-dependent fertilisation
For NEET preparation, read the corresponding NCERT Plant Kingdom section carefully and revise the examples, heterospory and life-cycle sequence before attempting MCQs.
NCERT-focused Biology notes, diagrams, MCQs and smart revision resources for Class 11, Class 12 and NEET Biology students.