BI-1141
Components of blood
Biology · Secondary 3 · Medium · Components of blood
Which adaptation of red blood cells best explains why an increase in their number improves an athlete’s performance at sea level after high‑altitude training?
- They have a nucleus to control cell division.
- They contain haemoglobin to carry more oxygen to muscles.
- They can engulf bacteria by phagocytosis.
- They help blood to clot at wounds.
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