What are fat soluble signalmolecules that are derived from cholesterol ?

Awave has a wavelength of 15 mm and a frequency of 6 hertz. what is its speed?

What's the waste product of electrons and pyruvate combining in fermentation?  

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.