Which of the following describes the use of a renewable form of energy?
a.) using natural gas to heat a house
b.) using a windmill to grind grain
c.) using petroleum to run a car
d.) using coal to generate electricity

Someone me with this: a mineral' is determined by its actomic structure.

What is the correct term for an area of rotating currents in an ocean? when ocean currents combine, they create an area of rotating currents called an

Ras is a g-protein that is activated when a growth factor attaches to egfr. its activation results in the replacement of a gdp molecule with a gtp molecule, thus allowing a signal transduction pathway to be activated. considering the signal pathway illustrated on this page, what is one potential outcome of a mutation in the ras gene that leads to ras protein hyperactivity. be specific.