Gymnosperms are a group of seed-producing plants that do not form flowers or fruits. Instead, their seeds are often exposed on cones or other structures. Common examples of gymnosperms include conifers like pine and spruce trees, which are well-adapted to various environments. These plants are characterized by their needle-like leaves and woody stems. Gymnosperms play a crucial role in ecosystems, providing habitat and food for wildlife. They are also important for humans, as they supply timber, paper, and other products.