Red blood cells are produced in_________...? Mcqs

✅ Correct Answer: Bone-marrow

✅ Correct Answer: Proteins

✅ Correct Answer: 30 trillion

✅ Correct Answer: Haemoglobin

✅ Correct Answer: Leukocytes

✅ Correct Answer: 120

✅ Correct Answer: Kidneys

✅ Correct Answer: Earthworm

✅ Correct Answer: Bone Marrow

✅ Correct Answer: Four groups

✅ Correct Answer: 5 – 21 days

✅ Correct Answer: Erythrocytes

✅ Correct Answer: Carbon dioxide

✅ Correct Answer: Amonia solvay process