Answer: The answer is the rental system.
Explanation: It produces, stores and eliminates urine and the fluid waste excreted by the kidneys.
Chromosomes; chromosomes can mutate during the creation of the next generation with semen and the egg.
The answer for this one is b) Looping of DNA
Answer:The Gas that is being transported and the smoke coming out of the chimney
Explanation: non renewable energy resources comes from sources that will run out of like Gasoline coal etc