Hurry please C- A biologist catches deer in a forest reserve, tags them and releases them back into the forest. A year later he catches 45 deer, of which 6 have tags. Knowing that this forest is inhabited by 375 deer, how many were captured and tagged or marked in the first time? *
25
250
500
50 ( with method )

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.