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Salmonella
There are more than 2300 types of Salmonella.
Daisy pollen (Helianthus sp.). The outer wall (exine) has many small spiky projections. The pollen gets caught in the body hairs of insects visiting the flower. Cross pollination occurs when insects fly to another similar flower and pollen is left behind. Pollen contains the male reproductive cells of a plant. When the pollen grain, containing the male gametes, lands on the stigma of a flower, it germinates. A pollen tube grows out from the germinal pore, down through the stigma, to the ovary. The male nuclei pass down the tube, fertilize the ovules and seed is formed. Humans can also be allergic to daisy pollen.
Magnification: x260
Copyright Dennis Kunkel Microscopy, Inc.
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For permission to license and use this image, please contact Dennis Kunkel:
Dennis Kunkel Microscopy, Inc.
P.O. Box 2008
Kailua, HI 96734
Phone: 808-263-0583
Email: kunkel@denniskunkel.com
www.denniskunkel.com
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