Why is stem cell treatment a scientific controversy?

Stem cell treatment and research has been a scientific controversy because of ethical reasons.

Plants have totipotent cells, which means each cell of the plant body has the capacity to divide and form an entire new plant. Consider plant tissue culture, in which an entire new plants is grown from a single cell. This is called totipotency.

Now, animals cells are not totipotent. They are plueripotent, which means they show totipotency for a short span of time, that is, in embryonic stages.

If a method was devised to grow animal cells artificially, that would be quite beneficial to those who require an organ. So scientists have tried to grow different tissues using the embryonic cells.

First of all, we all originate from a single cell, the zygote. It later divides and redivides to form embryo. This embryo then divides and differentiates to form the 250 different typesof cells(not number!).

So basically, stem cell research requires using embronic cells which means living embryos have to be destroyed to form different tissues. This is the reason that it has stirred up such a controversy since it requires destroying a living thing.