Question

APlanaria 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 twoPlanaria worms could regenerate to form the complete respective worms?
(a) only P
(b) only R and S
(c) P, R and S
(d) P, Q, R and S

Answer 1

(d) P, Q, R and S
In Planaria, each body piece can regenerate into a full, new organism.