Biology CLEP Prep Practice Exam

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Which of the following are organ systems that make up a human body?

Solar
Chemical
Electrical
Mechanical

The correct answer is: Chemical

When animals convert ADP to ATP, they undergo cellular respiration, which is a chemical process. Solar energy, electrical energy, and mechanical energy are all forms of energy that can be used by animals, but they are not directly involved in the conversion of ADP to ATP. Therefore, the correct answer is chemical energy.