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Gymnosperms are a type of plant that reproduce by a seed that is not enclosed as with angiosperms who have seeds contained flowers. Many of these plants are conifers or cone bearing plants. Gymnosperms are found throughout the world. They have roots and stems. Their leaves are in the form of needles in conifers.
At the time of pollination, the pollen or male pollen grains fall among the cone scales until they fall on to the ovules. As the cone grows up, it gets bigger and the seeds that are created by the male pollen and female parts are seen. Most conifers are evergreens or always green and they do not shed their leaves as deciduous plants do but retain their needles for quite a while. When the needles fall off, they are quickly replaced.