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Zorluk: OrtaThallophytes, Bryophytes, and Pteridophytes

During a laboratory examination of cryptogamic plant specimens, a student identifies a vascular cryptogam (pteridophyte). Which statement correctly describes the function of xylem tissue in this plant?

  1. A
    It translocates manufactured organic compounds bidirectionally from photosynthetic leaves to storage roots.
  2. It conducts water and dissolved mineral salts unidirectionally from roots to aerial plant structures.Cevap
  3. C
    It forms true vascular pathways within the thallus of non-vascular bryophytes to absorb water.
  4. D
    It secretes enzymes extracellularly to absorb dissolved organic matter from decaying substrates.

Cevap

It conducts water and dissolved mineral salts unidirectionally from roots to aerial plant structures.
In vascular cryptogams (pteridophytes), xylem tissue provides structural support and conducts water together with dissolved inorganic mineral salts upward from roots to stems and leaves.

Adım Adım Çözüm

1
Identify the plant group mentioned in the stem.
The specimen is a vascular cryptogam, which belongs to the division Pteridophyta.
Pteridophytes are the first land plant group to develop specialized vascular tissues (xylem and phloem) while reproducing via spores.
2
Determine the physiological role of xylem tissue.
Xylem conducts water and inorganic mineral nutrients unidirectionally from roots to shoots.
Xylem cells (tracheids and vessel elements) form hollow tubes for root-to-leaf transport driven by transpiration pull.

Anahtar Kavram

Vascular organization and xylem transport in Pteridophytes
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Konular

Thallophytes, Bryophytes, and Pteridophytes

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