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Question

In Paramecium undigested food is eliminated from the body through

A
Cytoproct
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B
Contractile vacuoles
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C
General body surface
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D
Cytostome
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Solution

The correct option is A Cytoproct
The cytoproct or cell anus of Paramecium caudatum was studied, using light optics and electron microscopy, at known times before, during and following food vacuole egestion. This was accomplished by microscopically observing single cells, fixing these cells at specific times and finally serial sectioning these individually processed cells. So, the correct option is "A" (Cytoproct).

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