MCQ
______ WBCs are present per mm3 of blood.
- A500 to 600
- B5000 to 11000
- ✓5000 to 11000
- D1,000 to 2000
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Reason (R): The cytoplasm of RBCs contains the respiratory pigment Haemoglobin.
| Column I | Column II | ||
| i. | Hibernation | a. | Birds in winter |
| ii. | Aestivation | b. | Polar bear in winter |
| iii. | Migration | c. | Some snails and fish in summer |