True or false there is usually only one way to properly place a microphone for particular instrument

What is the importantence of the carbon and nitretan cycles in the 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.

In which energy level are valence electrons located?