Bryophytes and Pteridophytes
Amphibians of the plant kingdom and the first vascular plants, with liverwort, moss and fern life cycles. (Biology › Plant Kingdom, NEET UG syllabus.)
What is Bryophytes and Pteridophytes?
The haploid (n) phase in the life cycle of plants that produces gametes (sex cells) by mitosis.
Key points
- Differentiate between bryophytes and pteridophytes based on their structural features and life cycles.
- Describe the key characteristics and ecological importance of bryophytes.
- Explain the life cycle patterns of mosses and ferns.
- Identify examples of liverworts, mosses, ferns, and horsetails.
Common exam trap
Confusing the dominant phase in bryophytes (gametophyte) vs. pteridophytes (sporophyte).
Definitions
- Term
Gametophyte
- Meaning
The haploid (n) phase in the life cycle of plants that produces gametes (sex cells) by mitosis.
- Term
Sporophyte
- Meaning
The diploid (2n) phase in the life cycle of plants that produces spores by meiosis.
- Term
Rhizoids
- Meaning
Root-like structures in bryophytes that help in anchorage but do not absorb water and nutrients like true roots.
- Term
Prothallus
- Meaning
The small, inconspicuous, free-living, mostly photosynthetic thalloid gametophyte of pteridophytes.
- Term
Sori
- Meaning
Clusters of sporangia (spore-producing structures) typically found on the underside of fern leaves (fronds).
- Term
Homosporous
- Meaning
Producing only one type of spore, which develops into a bisexual gametophyte (e.g., most ferns).
- Term
Heterosporous
- Meaning
Producing two different types of spores: microspores (male) and megaspores (female) (e.g., Selaginella, Salvinia).
- Term
Antheridium
- Meaning
The male sex organ in bryophytes and pteridophytes, producing antherozoids (male gametes).
- Term
Archegonium
- Meaning
The female sex organ in bryophytes and pteridophytes, producing a single egg (female gamete).
Learning objectives
Differentiate between bryophytes and pteridophytes based on their structural features and life cycles.
Describe the key characteristics and ecological importance of bryophytes.
Explain the life cycle patterns of mosses and ferns.
Identify examples of liverworts, mosses, ferns, and horsetails.
Understand the significance of vascular tissue and heterospory in plant evolution.
Prerequisites
Basic understanding of plant classification.
Knowledge of alternation of generations.
Familiarity with basic plant structures (roots, stems, leaves, vascular tissue).
Common mistakes
Confusing the dominant phase in bryophytes (gametophyte) vs. pteridophytes (sporophyte).
Forgetting that both require water for fertilization despite being terrestrial.
Misidentifying examples of homosporous vs. heterosporous pteridophytes.
Assuming bryophytes have true roots, stems, and leaves.
Not understanding the dependency of the sporophyte on the gametophyte in bryophytes.
Keywords
Bryophytes
Pteridophytes
Gametophyte
Sporophyte
Rhizoids
Prothallus
Sori
Homosporous
Heterosporous
Marchantia
Funaria
Sphagnum
Dryopteris
Selaginella
Salvinia
Vascular tissue
Alternation of generations
Practice preview
Which of the following plant groups is known as the "amphibians of the plant kingdom"?…
easy
Which of the following is the primary characteristic that distinguishes Pteridophytes from Bryophytes?…
easy
Identify the correct sequence of events in the sexual reproduction of a moss.…
medium