Question

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? *

Answer 1

Answer: All the cut pieces  

Explanation:

Planaria is a primitive organism that regenerates and hence all the pieces would regenerate to form complete respective worms

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