When the torque (force) produced by the exceeds that of the , knee extension occurs.

The first answer is wrong the right answer agonist, antagonist

Explanation:

When the torque (force) produced by the "agonist" exceeds that of the "antagonist", knee extension occurs. it is not produced by an engine or transmission it is the human muscles in the upper leg. Even a baby could understand this. Quote "knee extension occurs"(plz look at the pic below) how could you have missed this.....

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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."

the answer is c most of the fortnite players usually buy v bucks to get the battle pass and other cosmetics but some players who are referred to as "no skins" don't   buy skins and are usually noobs.

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