a. They have been found not only in bone marrow, but also in other tissues, including the adult brain. b. Although more difficult to grow than embryonic stem cells, they have been successfully grown in culture and made to differentiate into specialized cells. c. They are differentiated cells that can be induced to dedifferentiate and become totipotent. d. If pluripotent, they are capable of developing into different types of cells under appropriate conditions. e. These relatively unspecialized cells continually reproduce themselves.