micrograph sporangia from fern showing the thick annulus |
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| navigate by keyword : abstract micrograph fern pteridophyte sporangia annulus cluster sorus plant anatomy morphology tissue vascular brown reproduction meiosis microscope polarizer polarization glow magnified showing thick polarizing 40x |
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| Abstract micrograph of a cluster of sporangia from a fern,showing the annulus,made with a polarizing microscope at 40x |
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