Drag and drop each word into the correct location.
fossil fuels take to form. coal
formation begins in
while oil and
natural gas formation begins in
all
fossil fuels require heat and
in order to
form

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.