Cancer cells do not respond to signals that regulate cell . cancer cells form a mass of cells called a. cancer cells may break loose and throughout the body. cancer cells form tumors in other tissues by .

Which of the following is an advantage of using embryonic stem cells in medical research? a. the use of embryonic stem cells is much less expensive than the use of adult stem cells. o b. no living tissue is damaged when scientists use embryonic stem cells. o c. embryonic stem cells are able to differentiate into a wider range of cells than adult stem cells. d. there is no controversy surrounding the use of embryonic stem cells.