A worm X found in freshwater and slow-moving streams has been accidently cut into three pieces. It was observed that in due course of time, each cut piece of the worm develops to become a complete worm by growing all the missing parts.
(a) Name the worm X which can exhibit this phenomenon of making complete worm from its cut body parts.
(b) Name another organism Y which possesses the same characteristic of growing fully from its cut body parts.
(c) What is the name of this process in which a complete organism is formed from its cut body part.
(d) State whether X and Y are unicellular and/or multicellular organisms.
(e) Can a dog be produced completely form its cut body part (say, a cut tail) just like organisms X and Y? Why?
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Answer:
A.the X worm is planaria because in planaria the process of regeneration is formed by which if cut into two or more pieces it regenerate its body shape as it was before cutting
C. the process in which a complete organism is formed its cut body part is called regeneration
D. the organism x and y is a unicellular organism
E .no a dog cannot produce completely from its tail because it is an multicellular organism and could not regenerate
( I am sorry my dear I don't know the answer of B)
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