Ragweed pollen

Ragweed pollen

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Caption: Ragweed pollen. Coloured scanning electron micrograph (SEM) of pollen grains from the ragweed (Ambrosia sp.). This plant is common on waste ground. Spines on the pollen grains help them attach to their insect pollinators. These pollen grains are an allergen which may cause hay fever in susceptible people. Magnification: x2300 at 35mm size.

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Keywords: allergen, allergic rhinitis, allergy, ambrosia sp., botany, grains, hay fever, hayfever, insect pollination, nature, plant, plants, pollen, ragweed, reproduction, reproductive, scanning electron micrograph, sem

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