What synthetic substance is similar to the male sex hormone testosterone ?

Which simple machine is not part of this compound machine? a. lever b. pulley c. inclined plane d. wheel and axle

What effects result when there is an impact between earth and an asteroid? check all that apply. a. massive flooding. b. extinction of many life forms. c.major earthquakes change in average global temperature. d. giant dust cloud

The energy produced as a result of this flow of electrons from atom to atom is called