Fuel cells are highly efficient power generating systems that produce electricity. Which of the following statements about fuel cells is false? A)
The only waste product from a fuel cell is water.
B)
Fuel cells are not a good transition product from fossil fuels to renewable energy.
C)
Fuel cells are efficient based on size and energy output.
D)
Fuel cells can be used in automobiles, homes, and power plants.
E)
Fuel cells can be used to store large amounts of energy.

8) animals respond in various ways to stimuli detected through their senses. some of these responses are stimulated by the presence of danger. which of these animal responses is the best example of a response to an immediate threat? a) a rooster crows every morning at the first sign of light. b) as something approaches an octopus, it shoots a cloud of ink. c) from late fall until spring, bears hibernate to preserve energy. d) a dog is getting hot in the sunlight, so he moves to a shaded area.