Answer:
12 may be the answer also there is a possibility od 15 but more likeltly its going to be 12
If this is just a true or false, the answer is true. Dependent implies that they cannot function without it.
Natural gas is comprised of methane with small amounts of ethane,propane,butane and pentane.
The simpler molecular structure of natural gas enables a clean burn, so it's combustion does not produce solid particles or sulpher. It is used for heating,cooking,electricity generation and fuel for some cars.
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DNA in all humans are composed of the same stuff just not the same genes (basically) . Organisms like sea animals for example wouldn't have the same DNA with us because they havebto survive in a different environment and have to have special obillities
