Shelled amoeba. Polarised light micrograph of an Arcella sp. testate (shelled) amoeba, showing its internal organelles. The circular shell is formed from the polysaccharide chitin. This amoeba is found in freshwater ponds and puddles. It can develop vacuoles of carbon dioxide in its body to float up to the water's surface. Magnification: x400 when printed at 10 centimetres wide.

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TOP16630967

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達志影像

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RM

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須由TPG 完整授權

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