Question

why earthworm looks dark in colour & a dark vertical line on the dorsal surface​

Answer 1

Answer:

The dorsal side of an earthworm is muddy brown in color and darker than the ventral side. ... Earthworms blend in with the dirt when seen from above. The ventral side is hidden underneath and does not need to blend in. C) It acts as camouflage.

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Answer 2

Answer:

In an earthworm dark colour

appears because, earthworm have heamoglobin in their blood

in heamoglobin earthworm contains

Erythrocronin which is dark in colour

That is why

Earthworm appears Dark in colour

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