Study the diagram given below and answer

A Planaria worm is cut horizontally in the middle into two halves P and Q such that the part P contains the whole head of the worm. Another Planaria worm is cut vertically into two halves R and S in such a way that both the cut pieces R and S contain half head each. Which of the cut pieces of the two Planaria worms could regenerate to form the complete respective worms?

Options

A. Only P
B. Only R and S
C. P, R and S
D. P, Q, R and S

Answer

D

Explanation

Planaria reproduces asexually by regeneration. It is the ability of a fully differentiated organism to give rise to new individual organisms from its body parts. Small cut or broken parts of the organism.s body grow or regenerate into separate individuals.