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progymnosperm

/ˌprəʊ.dʒɪmˈnəʊ.spɜːm/

翻译: 一种已灭绝的早期种子植物类群,被认为是现代裸子植物的祖先。

1 个条目

noun

/ˌprəʊ.dʒɪmˈnəʊ.spɜːm/C2formalscientific
  • zh一种已灭绝的早期种子植物类群,被认为是现代裸子植物的祖先。

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.

    zh前裸子植物

    • 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.