Which statement describes one characteristic of an operating electrolytic cell?
(1) it produces electrical energy.
(2) it requires an external energy source.
(3) it uses radioactive nuclides.
(4) it undergoes a spontaneous redox reaction.

The answer is (2). The electrolytic cell mechanism is to convert the electrical energy to chemical energy. So it need external energy source. And there is a similar one called voltaic cell which will convert the chemical energy to electrical energy.

False because saturated fatty acids contain only single bond

Tropical easterlies is mostly likely your answer correct me if i’m wrong