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Gymnosperms are a group of seed-producing plants that have naked seeds, meaning their seeds are not enclosed within a protective fruit. They are one of the major groups of plants, along with angiosperms (flowering plants). Gymnosperms are classified into four main divisions: Cycadophyta, Ginkgophyta, Gnetophyta, and Coniferophyta. 1. Cycadophyta (Cycads): Cycads are ancient gymnosperms that were abundant during the Mesozoic era but are now relatively rare. They typically have a palm-like appearance with a stout trunk and large, compound leaves. Cycads are often found in tropical and subtropical regions. Some common genera of cycads include Cycas, Encephalartos, and Zamia. 2. Ginkgophyta (Ginkgo): The Ginkgo division consists of a single living species, Ginkgo biloba. It is a unique gymnosperm with fan-shaped leaves and is considered a living fossil. Ginkgo trees are known for their resistance to pests and diseases. They are commonly cultivated as ornamental trees and are native to Chin...