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Difficulty: MediumThallophytes, Bryophytes, and Pteridophytes

A plant specimen collected from a damp terrestrial microhabitat displays simple stem-like and leaf-like structures anchored by multicellular rhizoids. Microscopic analysis confirms that it completely lacks true vascular tissues such as xylem and phloem, and its dominant, independent generation phase is haploid. To which division does this organism belong?

  1. BryophytaAnswer
  2. B
    Pteridophyta
  3. C
    Spermatophyta
  4. D
    Thallophyta

Answer

Bryophyta
Bryophytes are non-vascular cryptogams that lack specialized xylem and phloem. They are anchored by rhizoids and are unique among land plants because their main, long-lived plant body is the haploid gametophyte.

Step-by-Step Solution

1
Analyze internal conducting tissues described in the stem.
The specimen completely lacks xylem and phloem vessels.
The absence of specialized vascular tissue distinguishes non-vascular cryptogams from vascular plant groups.
2
Evaluate body differentiation and dominant generation.
The plant exhibits rhizoids with stem-like/leaf-like structures and has a dominant haploid generation.
Bryophytes have a plant body organized into simple structures anchored by rhizoids, with a dominant gametophyte phase.
3
Deduce the correct botanical division.
The specimen belongs to the division Bryophyta.
Bryophyta is the only non-vascular division among land plants with a dominant haploid gametophyte.

Key Concept

Non-vascular nature and gametophyte dominance in Bryophytes
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Topics

Thallophytes, Bryophytes, and Pteridophytes

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