Prior to cell division, the dna material in the original cell must be duplicated. why is this important?

Based on the results of this study, what questions remain unanswered? how can these questions guide future research

9. the history of life on earth is recorded in

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.