Answer:
Explanation:
Definition:
The stem cell is undifferentiated cell which have ability to produce many more indefinitely cells from which other type of cells formed through differentiation.
Controversy:
There is the controversy about stem cell but only for embryonic stem cells not for all stem cell. The controversy is about the ethics of research because it involve the destruction of human embryos.
Opinion about using them in research:
Stem cells are very important in research point of view because stem cells help in understanding how disease is occur, how they develop into bones, muscles, nerves, tissues, organs etc.
