Animal without red blood cells is_________ ?
Correct answer: B. Earthworm
- A. Frog
- B. Earthworm
- C. Snake
- D. Crocodile
Explanation
Earthworms do not have red blood cells; their haemoglobin is dissolved directly in the blood plasma. Vertebrates such as frogs, snakes and crocodiles possess red blood cells, although those cells retain nuclei in these animals.
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