Where does myosin get the energy to perform a contraction?

Which of the following choices is not an effective solution to the energy waste related to inefficient lighting? a. using low-pressure sodium lighting sources b. pointing lights on billboards and street signs upward c. placing light sources on time controls d. shielding light to direct it downward

How can you keep track of variables in a science experiment?

Which element forms the basis of all organic organisms a carbon b oxygen c hydrogen d nitrogen