Select the correct answer from each drop-down menu. What kind of species can harm an ecosystem or human health when introduced into the new environment?
A species whose introduction does or is likely to cause economic or environmental harm or harm to human health is a(n)
species. These species are
to the new environment.

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.