Question

Brown colour of earthworm is due to

• A. Melanin
• B. Porphyrin
• C. Haemoglobin
• D. Both A and B

Answer 1

The correct option is B Porphyrin

Earthworm is a glistening deep brown in colour. The dorsal surface is darker than the ventral surface and carries a dark colour median line due to the dorsal blood vessel which is seen through the integument. The brown colour of the worm is due to the pigment porphyrin present in the body wall and it protects the body against bright and UV rays of the sunlight.

So the correct answer is 'Porphyrin'.