Carmine particle when placed above osculum of a sponge would be

Left there

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Ingested and digested

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Thrown away

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Ingested and thrown away by ostia

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Solution

The correct option is C Thrown away
Osculum is the exhalant pore in sponges through which water flows out of the body. Water enters the body of sponges trough ostia and leaves through osculum. Anything placed above osculum, will be carried away with the water.
Hence, carmine particle put above osculum of a sponge would be thrown above.
So, the correct answer is 'Thrown away'.

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