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progymnosperm

/ˌprəʊ.dʒɪmˈnəʊ.spɜːm/

Traduction: Groupe ancestral éteint de plantes, dont on pense que les gymnospermes modernes sont issus.

1 entrée

noun

/ˌprəʊ.dʒɪmˈnəʊ.spɜːm/C2formalscientific
  • frGroupe ancestral éteint de plantes, dont on pense que les gymnospermes modernes sont issus.

An extinct ancestral group of plants from which modern gymnosperms are believed to have evolved.

  1. Ancestral plant groupC2formalscientific

    An extinct group of plants that are considered the ancestors of modern gymnosperms, combining features of ferns and seed plants.

    frProgymnosperme

    • Progymnosperms first appeared in the Devonian period.
    • Fossil evidence suggests progymnosperms had both fern-like leaves and woody stems.
    • Scientists study progymnosperms to understand the evolution of seed plants.