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G. biloba in Tournai, Belgium. Ginkgos are large trees, normally reaching a height of 20–35 m (66–115 ft), [10] with some specimens in China being over 50 m (165 ft). ). The tree has an angular crown and long, somewhat erratic branches, and is usually deep-rooted and resistant to wind and snow dam
The ginkgo (Ginkgo biloba) is a living fossil, with fossils similar to the modern plant dating back to the Permian, 270 million years ago. The closest living relatives of the clade are the cycads, [4] which share with the extant G. biloba the characteristic of motile sperm.
Ginkgoales are a gymnosperm order containing only one extant species: Ginkgo biloba, the ginkgo tree. [1] The order has a long fossil record extending back to the Early Permian around 300 million years ago from fossils found worldwide.
The Ginkgoaceae is a family of gymnosperms which appeared during the Mesozoic Era, of which the only extant representative is Ginkgo biloba, which is for this reason sometimes regarded as a living fossil. Formerly, however, there were several other genera, and forests of ginkgo existed.
Ginkgolide B, specifically, is a diterpenoid trilactone with six five-membered rings. It contains a spiro[4,4]-nonane carbocyclic ring, a tetrahydrofuran ring, and a very specific tert-butyl group at one of the rings (Figure 1).
The director of the Office of Personnel Management is also ordered to exclude coverage for gender-affirming care for minors from the 2026 plan year for Federal Employee Health Benefits and Postal ...
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