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Zorluk: KolayEvolutionary Trends and Adaptive Features in Organisms

In the evolutionary adaptation of seed-bearing plants to terrestrial life, which characteristic distinguishes gymnosperms from angiosperms?

  1. Bearing naked seeds on cones that are not enclosed within an ovaryCevap
  2. B
    Producing seeds enclosed within a matured ovary wall or fruit
  3. C
    Lacking lignified vascular tissues such as xylem and phloem
  4. D
    Requiring a film of water for flagellated sperm to reach the ovule

Cevap

Bearing naked seeds on cones that are not enclosed within an ovary
Gymnosperms represent an evolutionary stage of seed plants where seeds are borne 'naked' on cone scales rather than enclosed inside a protective ovary wall or fruit.

Adım Adım Çözüm

1
Identify the key evolutionary feature of gymnosperms in plant classification.
Gymnosperms are seed plants (spermatophytes) whose seeds develop exposed on megasporophylls or cone scales.
The term 'gymnosperm' literally translates to 'naked seed', highlighting the absence of a carpel or ovary wall surrounding the seed.
2
Compare this feature with angiosperms.
Angiosperms develop flowers and enclose their seeds within ovaries, which mature into fruits.
The key distinction between the two spermatophyte groups is seed enclosure within an ovary.

Anahtar Kavram

Gymnosperm vs. Angiosperm Evolutionary Adaptations
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Konular

Evolutionary Trends and Adaptive Features in Organisms

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