In the amoeba, water input and output are controlled by the nucleus food vacuole vacuole pseudopodia

The correct answer for the fill in the blank is-  Vacuole.

Vacuole or contractile vacuole is a specialised subcellular organelle that is responsible for osmoregulation ( balance of water and electrolyte concentration).

For instance, in freshwater environment ( which is hypotonic), it allows the water to accumulate inside the cell.

It is predominantly found in protists ( such as Amoeba and Paramecium) and unicellular algae. It prevents the organism from rupturing or lysing as it controls the input and output of water.

the denominator has a very specific role.

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