The animal without red blood cells is
- Aearthworm
- Bsnake
- Cpeacock
- DMore than one of the above
- ENone of the above
Show answer and explanation
Correct answer: (a) earthworm
Explanation
The earthworm has no red blood cells; its haemoglobin is dissolved directly in the blood plasma rather than packed in cells.
Snakes and peacocks are vertebrates that possess true red blood cells (RBCs) carrying haemoglobin.
Hence only the invertebrate earthworm lacks RBCs.