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Seed plant - Wikipedia
A seed plant or spermatophyte (lit. 'seed plant'; from Ancient Greek σπέρματος (spérmatos) 'seed' and φυτόν (phytón) 'plant'), also known as a phanerogam (taxon Phanerogamae) or a …
Seed plant | Definition, Examples, & Taxonomy | Britannica
seed plant, any of the more than 300,000 species of seed-bearing vascular plants. Although the taxonomic division Spermatophyta is no longer accepted, the term spermatophyte is used to …
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Seed | Form, Function, Dispersal, & Germination | Britannica
2024年10月11日 · Seed, the characteristic reproductive body of both angiosperms and gymnosperms. Essentially, a seed consists of a miniature undeveloped plant (the embryo), …
What Is a Seed? - New York Botanical Garden
2021年4月2日 · Seed plants appear in the fossil record around 300 million years ago, and they are now the most abundant and diverse plant group on earth, with nearly 400,000 species. …
9.9: Seed Plants - Biology LibreTexts
Most vascular plants are seed plants, or spermatophytes. They reproduce with seeds and pollen. Some modern seed plants are gymnosperms that produce seeds in cones.
Seed Plants - Biology Online Tutorial
There are two main subdivisions of seed plants—the ones without covered seeds, the gymnosperms, and the ones with covered seeds, the angiosperms. In this tutorial, we will …
2.6.1: Introduction to Seed Plants - Biology LibreTexts
Learning Objectives. Explain how heterospory led to the evolution of seeds. Connect r- and k-strategies to propagules produced by plants (e.g. spores, gametes, pollen, and seeds). List a …
5 Types of Seeds to Plant: Open-Pollinated, Hybrid, and Heirloom
2023年9月19日 · Open-pollinated seeds form when pollination occurs by insects, birds, wind, or humans. Open-pollinated seeds are the best choice for those interested in seed saving …
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