Which accurately describes the relationship between nutrients and life-forms in an estuary? A As nutrients increase, the number of life-forms stays the same.

B As nutrients increase, the number of life-forms increases.

C As nutrients decrease, the number of life-forms stays the same.

D As nutrients decrease, the number of life-forms stays the same.

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.