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- Gymnosperms, also called Acrogymnospermae (1), are a group of seed-bearing plants (spermatophytes) with ovules on the edge or blade of an open sporophyll or ovuliferous scale (Fig. 1). 7eir closest extant relatives are the angiosperms, which have ovules enclosed in a carpel.
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Oct 26, 2024 · Pollination Mechanism: Gymnosperms typically rely on wind pollination, whereas angiosperms often utilize insects, animals, and wind. Diversity: Gymnosperms are less diverse, with around 1,000 species, while angiosperms boast over 300,000 species. Characteristics of Gymnosperms. Gymnosperms possess several distinctive characteristics:
The gymnosperms (/ ˈdʒɪmnəˌspɜːrmz, - noʊ -/ ⓘ JIM-nə-spurmz, -noh-; lit. 'revealed seeds') are a group of seed-producing plants that include conifers, cycads, Ginkgo, and gnetophytes, forming the clade Gymnospermae. The term gymnosperm comes from the composite word in Greek: γυμνόσπερμος (γυμνός, gymnos, 'naked ...
Sep 22, 2021 · In contrast, all seed plants, or spermatophytes, are heterosporous, forming two types of spores: megaspores (female) and microspores (male). Megaspores develop into female gametophytes that produce eggs, and microspores mature into male gametophytes that generate sperm.
Among the numerous other gymnosperm species are many different reproductive processes. Some gymnosperms, for example, are dioecious, with microstrobili and megastrobili being borne on separate plants, as in junipers (Juniperus), plum yews (Cephalotaxus), yews (Taxus), and podocarps (Podocarpus).
- Hans Lambers
While angiosperms have an enormous variety of body types and forms, ranging from annual herbs to climbing vines to massive trees, gymnosperms are largely woody trees and shrubs. Gnetum is the only gymnosperm genus with climbing vines. As vascular plants, both groups contain xylem and phloem.
- Melissa Petruzzello
Gymnosperms (“naked seed”) are a diverse group of seed plants and are paraphyletic. Paraphyletic groups do not include descendants of a single common ancestor. Gymnosperm characteristics include naked seeds, separate female and male gametes, pollination by wind, and tracheids, which transport water and solutes in the vascular system.
Jul 31, 2022 · Gymnosperm seeds are not enclosed in an ovary; rather, they are exposed on cones or modified leaves. Sporophylls are specialized leaves that produce sporangia. The term strobilus (plural = strobili ) describes a tight arrangement of sporophylls around a central stalk, as seen in cones.
