Question

Blood of Pheretima is ............... which helps in exchange of respiratory gases.

• A. Blue with haemocyanin in corpuscles
• B. Blue with haemocyanin in plasma
• C. Red with haemoglobin in corpuscles
• D. Red with haemoglobin in plasma

Answer 1

Answer: (D)

Red with haemoglobin in plasma

Blood in earthworm is red due to haemoglobin as it is present in higher animals but it is dissolved in plasma and not confined to special corpuscles like erythrocytes. The plasma contains many colourless and nucleated corpuscles.

So, the correct answer is option D.