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In Pinus, a gymnosperm, pollination and fertilisation involve distinct processes that ensure sexual reproduction without flowers. Pollination in Pinus is primarily anemophilous, meaning it occurs through wind. The plant produces two types of cones: male (microsporangiate) and female (megasporangiate). Male cones are smaller, numerous, and produce abundant pollen grains, which are ____ ____ ___ __________ _________ ________ _____ ______ _______ ____ _____.
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