Planarian is the common name for several genera of flatworms. When a planarian is cut in half, each half eventually grows back into a complete worm. Which of the following does this process most resemble?
A.
asexual reproduction in which a mutation has occurred
B.
asexual reproduction of a single-celled organism
C.
sexual reproduction in which identical twins are produced
D.
sexual reproduction of a single-celled organism