3. What is the structure of prokaryotic cells?
A. The DNA is wrapped in a protective membrane.
B. The DNA is many separate strands.
C. The DNA is one endless loop.
D. There is no DNA in prokaryotic cells.
4. Based on the context, in paragraphs 2 and 5 mambo

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.