What do cells have to do with living thing?

Answer 1

Cells are living things in and of themselves. There are single celled organism that science defines as alive as you are. You are made up of billions of cells that all have the same DNA (genetic information that is the key to making everything that you are) as each other. Humans, along with all other multicellular organisms, start as one living cell. This is the entirety of what the organism is at this point. As that cell divides and replicates itself the organism begins to take shape and eventually matures into its fully formed state. Cells continue to die and replicate in this stage. If the science behind DNA and how different genes can be turned on and off were better understood it is theoretically possible to grow an identical body from a single human cell. The first cell of any organism is the organism and is alive. If that cell were not alive or the organism itself the organism could never and would never exist.