Which type of stem cell can differentiate into the least number of types of cells?

Unipotent stem cell

Explanation:

This kind of stem cell can only differentiate into one type of cell. This type of stem cell is also referred to as a precursor cell. An example is hepatoblast that differentiates into a hepatocyte. The other types of stem cells’ potency, in order of increasing potency, is oligopotency, multipotency, pluripotency, and totipotency.

good one: produce hormones that plants grow.

bad one: the problem with organic matter is that while plant nutrients are needed for crop growth, they can also stimulate excessive growth of the wrong plants – mainly, algae.