1. What types of natural phenomena could serve as time standards?
​

Which statement correctly describes a step-up transformer? a. it increases the amount of electric energy available. b. it increases the voltage of an electric current. c. it changes direct current into alternating current. d. it has more loops of wire in its primary coil.

Describe the function of the endomembrane system? what organelles are involved?

Which of the following are considered noble gases? a. bromine b. neon c. argon d. chlorine