While minute in size, pollen grains are produced in high enough volumes by plants to form an important food source for lots of invertebrates.
Pollen is a powder, produced by the male components of the flower, that triggers the production of seeds by the female components of the same type of flower. Each pollen grain is made up of an outer wall, within which are a non-reproductive cell and a reproductive cell, responsible for producing the pollen tube and the sperm cells required for fertilisation, respectively – enabling reproduction.
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