when a cell chooses a particular genetically determined path that causes it to perform only a few specialized tasks... more
Scientists used to think that nerve cells were incapable of regeneration if they were damaged. This means that when you are born, you would have all the neurons that you would ever have in your life—take care of them because if they die they don't come back.
In order for cells to become whole organisms, they must divide and differentiate. Cells divide all the time. That means that just one cell, a fertilized egg, is able to become the trillions of cells that make up your body, just by dividing. Those trillions of cells are not all the same though.
What is cloning and do we have clones living among us today? The answers might surprise you or maybe we should say ewe.
