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A man observed an earthworm and saw a swollen region towards the anterior side of the earthworm a) What is this region called b) Which segment constitutes

this swelling? c) What is the role performed by this region?


A. Prostomium
b. The 1st segment or the mouth constitutes this swelling.
c. It acts like a lip of the worm through which worm can grab food.
2 4 2
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