Which of the steps in this sequence of events is an example of mitosis at work?
A baseball hits the arm of a baseball player.
The player reacts quickly grabbing his arm.
A bruise forms where the ball hit the arm.
The bruise slowly disappears as the arm heals.

In the presence of oxygen, glycolysis is followed a. the krebs cycle b. lactic acid fermentation c. alcoholic fermentation d. photosynthesis

In which part of the body is a ball-and-socket joint found?

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.