Give two examples of mixtures in which the physical properties of the ingredients, or substances, are maintained, or NOT changed, when they are mixed together. Then give two examples of mixtures in which the physical properties of the materials ARE changed when they are mixed together.

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.