grass pollen grains closeup view illustration
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Stockphotos.ro (c) 2025. All stock photos are provided by Dreamstime and are copyrighted by their respective owners.
grass pollen grains closeup view illustration |
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| navigate by keyword : pollen plant grass dispersal blooming flowers stamen lung pollination mucous membrane trachea inhale immune sporopollenin seed nose pollinosis defense cough fever allergy autoimmune disease sneeze air itch fertilization medicals season hay spore allergen particle botany meadow food honey bee reproduction grain tree asthma snot swollen spring system reaction germ rhinitis allergic |
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| Pollen is a powdery substance produced by most types of flowers of seed plants for the purpose of sexual reproduction. It consists of pollen grains (highly reduced microgametophytes), which produce male gametes (sperm cells). Pollen grains have a hard coat made of sporopollenin that protects the gametophytes during the process of their movement from the stamens to the pistil of flowering plants, or from the male cone to the female cone of gymnosperms. |
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Stockphotos.ro (c) 2025. All stock photos are provided by Dreamstime and are copyrighted by their respective owners. |
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