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?

REPRODUCTION IN ORGANISMS

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Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]

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

Explanation:

Detailed explanation-1: -They have the unique ability to regenerate, meaning they can re-grow the new tissue to replace lost or injured tissue.

Detailed explanation-2: -Planaria exhibit an extraordinary ability to regenerate lost body parts. For example, a planarian split lengthwise or crosswise will regenerate into two separate individuals.

Detailed explanation-3: -Yes, a Planaria cut vertically into two halves regenerate into two individuals. Planaria can be cut into pieces and each piece can regenerate into a complete organism. The shaded part in the figures D and E represents the regenerated halves.

There is 1 question to complete.