Which of the following statements about meiosis is true? A.Meiosis produces 4 diploid (2N) cells from a single haploid (1N) cell.
B.Meiosis takes place in reproductive tissue and produces gametes.
C.Every tissue in the body has some cells that occasionaly undergo meiosis.
D.Meiosis always takes place after a cell undergoes mitosis.

B.Meiosis takes place in reproductive tissue and produces gametes.

Explanation:

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The correct option is B.

In single celled animals, contractile vacuole function in osmoregulation by regulating the quantity of water that is found in the cell, thereby regulating the osmotic pressure of the cell. Contractile vacuoles are usually found in freshwater protists.
The cells of unicellular organisms operate by osmosis, therefore, the water and the solute contents of the cell have to be balanced. Thus, if there is too much water in the cell, the contractile vacuole functions by pumping the water out of the cell. This helps to protect the cell from bursting, because if the quantity of water inside the cell is too much, the cell will swell up and burst.