Why does an earth worm find it difficult to move on glass

Dear Student

Earthworms have bristles or setae in groups around or under their body. The bristles, paired in groups on each segment, can be moved in and out to grip the ground or the walls of a burrow. Worms travel through underground tunnels or move on the soil surface by using their bristles as anchors, and pushing themselves forward or backward using strong stretching and contracting muscles.

Earthworm is unable to walk on glass surface because it is a very smooth surface and there is a lack of grip on glass surface. 


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