What is one of the ways in which the skin cools the body?
creating extra keratin
decreasing the body's melanin
sending more collagen to the cells
dilating surface blood vessels

Explain why it’s important for scientists to study the sun. list at least two challenges researchers face when examining earth’s nearest star.

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.

What are the basics of the induced fit model of enzyme action?