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Difficulty: EasyEvolutionary Trends and Adaptive Features in Organisms

Which group of plants represents an intermediate evolutionary trend by possessing true vascular tissues (xylem and phloem) but reproducing via spores rather than seeds?

  1. PteridophytesAnswer
  2. B
    Bryophytes
  3. C
    Gymnosperms
  4. D
    Thallophytes

Answer

Pteridophytes represent the intermediate plant group possessing vascular tissue without seed production.
Pteridophytes are evolutionary intermediates in plant kingdom adaptation. They were the first land plants to evolve specialized vascular tissues (xylem and phloem) for efficient internal transport, yet they retain the primitive reproductive strategy of dispersing via spores.

Step-by-Step Solution

1
Identify the evolutionary advancement tested.
The presence of true vascular tissue (xylem and phloem) for conducting water and nutrients.
Vascular tissue allowed plants to grow taller and adapt to terrestrial environments.
2
Determine the reproductive limitation specified.
Reproduction via spores rather than seeds.
Seed production evolved later in seed plants such as gymnosperms and angiosperms.
3
Match these characteristics to the correct plant group.
Pteridophytes meet both criteria as seedless vascular plants.
Pteridophytes possess specialized conducting tissues while using spores for dispersal.

Key Concept

Evolutionary trends in plant transport and reproductive systems
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Topics

Evolutionary Trends and Adaptive Features in Organisms

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