Final answer:
The contractile vacuole in paramecium is not an evolutionary offshoot of the kidney.
Step-by-step explanation:
The statement that the contractile vacuole of the paramecium is possibly an evolutionary offshoot of the kidney is False.
Contractile vacuoles in paramecium are responsible for removing excess water from the cell to prevent it from bursting in a hypotonic environment. They are not directly related to the kidney or any excretory function.
The contractile vacuole works by continuously pumping water out of the organism's body through a process called exocytosis, in which the vacuoles merge with the cell membrane and expel waste into the environment.