Question

Which of the following contains stem cells that can produce only their own type of cells?

1) 6-week-old embryo

2) Adult

3) 3-day-old embryo

4) Blastocyst

Answer 1

Hello, XxBaddiexx!! Your answer would be 2 - Adult because the adult stem cell can renew itself and repair the tissues they are found in, if it is needed. I hope this helps!! Have a great day.

Answer 2

2) Adult

Step-by-step explanation:

Adult stem cells or somatic stem cells produce only their own type of cells. They are undifferentiated cells present throughout the body and are used to regenerate damaged tissues and replenish dying cells. They can generate all the cell types of the organ from which they originated. Some can even regenerate the entire organ.

Common signalling pathways found in adult stem cells are Wnt, Notch and TGFβ. They can be of many types. For example: Hematopoietic stem cells are present in bone marrow and all types of blood cells can originate from them. Intestinal stem cells are present in crypts of Lieberkuhn and can give rise to cells of small and large intestine.