AP BIOLOGY

Detailed explanation-1: -The cell is the smallest living thing that can perform all the functions of life. All cells must come from preexisting cells.

Detailed explanation-2: -Your cells have metabolic enzymes that break down proteins, fats and sugars into energy packets that can be used to build and regulate the cells. Another key aspect of being “alive” is being able to reproduce.

Detailed explanation-3: -If you take a human cell and apply either of the definitions above, it is alive. A cell is capable of autonomous reproduction, and metabolizes substances harvested from its environment. The same holds true of you look at the human body.

Detailed explanation-4: -The most common way to identify dead cells is using a cell-impermeant DNA binding dye, such as propidium iodide or a dye from the STYOX series. A healthy living cell has an intact cell membrane and will act as a barrier to the dye so it cannot enter the cell.

Detailed explanation-5: -Yes, individual cells are life forms and most of the ones that compose your body are alive.