Fossils cannot form if the plant or animal: is decayed
dies
is burled
remains on the surface

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.

All other things being equal the size of a population will decrease if

Currents are caused by temperature and density differences