Definitions from the Web
Term: Progymnosperm
Definition:
A progymnosperm is an extinct group of plants that existed during the Devonian and early Carboniferous periods, which were transitional between the fern-like plants and true gymnosperms.
Sample Sentences:
- The fossils of progymnosperms provide valuable insights into the evolutionary history of gymnosperms.
- During the Devonian period, progymnosperms dominated many terrestrial ecosystems.
- Scientists have been able to reconstruct the morphology of progymnosperms based on fossil evidence.
- Unlike their ancestors, progymnosperms had secondary growth, which allowed them to grow taller and stronger.
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