A physical change occur when objects or substances undergo a change that does not change in which the composition of a substance changes or one or more substances combine or break up from new substances.
Plants are producers and make their own food through a process of photosynthesis.
Organisms are classified into domains according to shared characteristics.
Answer:
The statement "The stem cells preserved from the umbilical cord of the person" is the BEST source of stem cells and minimizes the risk associated with stem cell transplantation.
Explanation:
On late back before 90s people use to throw away the umbilical cord as well as the blood because they believed it as a medical waste. But, in today's generation parents are found to be storing safely their baby's umbilical cord and the blood as it has the stem cells which can be used against the treatment of various life-threatening and debilitating diseases. It has also shown the visible results in the treatment.