Which statement best describes a cell? A. A compartment that contains DNA and regulates when genes are turned on and off. B. the smallest structural and functional unit of organism can can be said to be alive. C. A Sac-like membrane that stores water. D. A small compartment that includes a cytoplasm nucleus and a cell membrane

B. the smallest structural and functional unit of organism can can be said to be alive.

Explanation:

Cell -

cell is the basic functional and structural unit of the living organisms.

Cell is considered to be the tiniest unit of the life, being the the building block of the organism.

The cell consists of a cell membrane, cytoplasm, and nucleus.

human body is composed of about 40 trillion of cells.

hence, the correct option about cell is (B).

B. Remember the saying "Cells are often the 'building blocks of life.'."