If everyone on the planet used the same amount of resources as an average American, what percent of
the Earth would need to be used to support
everyone?
A. 150%
B. 75%
C. 200%
D. 50%

While Americans constitute the 5% of the world population, they use around the 24% of the world's energy.

Then, if the 100% of the population were like the Americans, we have:

5%*x = 100%

x = 100%/5% = 20

the whole population is 20 times the population of the US, then the total energy used is 20 times the energy used in the US.

Then the energy that the 100% of the population would use is equal to:

20*24% = 480%

Sowe actually would need like 5 Earths.

So none of the options is matches this, but this may be because this question is about some specific resources and not for the specific energy used. The closest option is 200%

c.) polymerase chain reaction

- "unlike the original dna fingerprinting method, dna profiling does not use restriction enzymes to cut the dna. instead it uses the polymerase chain reaction (pcr)? to produce many copies of specific str sequences. pcr is an automated procedure that generates lots of copies of a specific sequence of dna."