Natural gas is energy-efficient because

Natural gas is often described as “clean burning” because it produces less waste than any gas. Like all fossil fuels, its combustion emits carbon dioxide, but at about half the rate of coal per kilowatt hour of electricity generated. It is also more energy efficient.

Explanation:

it does not have to be converted to electricity

Explanation:

answer; ///i believe that the correct answer is (the worksheet);

prokaryotic cells do not have a nucleus in which the dna is stored in, it floats freely inside the cell.

eukaryote cells do have a nucleus in which the dna is stored in.