In adults, stem cells remain undifferentiated until they are needed to repair or replace other cells. Stem cells can produce cells that are identical to themselves.
Answer:
When finding the probability calculation, you can divide the number of events by the no. of the possible outcomes, and that can give you the probability of the event from there. If you use this strategy, you can determine the outcome from there! Hope this helps. ^_^
Answer: Chemical changes are different from physical changes because chemical changes have a chemical reaction.
Explanation: A chemical change results from a chemical reaction, while a physical change is when matter changes forms but not chemical identity. Examples of chemical changes are burning, cooking, rusting, and rotting. Often, physical changes can be undone, if energy is input. It's on google.