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The hemoglobin of a human fetus:

  1. A
    Has a higher affinity for oxygen than that of an adult
  2. B
    Has a lower affinity for oxygen than that of an adult
  3. C
    Has the same affinity for oxygen as that of an adult
  4. D
    Has only 2 protein subunits instead of 4

Solution & Step-by-step Explanation

Fetal hemoglobin () has a higher affinity for oxygen than adult hemoglobin (). This allows the fetus to effectively "pull" oxygen from the mother's blood across the placenta.

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The hemoglobin of a human fetus:
A
Has a higher affinity for oxygen than that of an adult
B
Has a lower affinity for oxygen than that of an adult
C
Has the same affinity for oxygen as that of an adult
D
Has only 2 protein subunits instead of 4

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Human PhysiologyBreathing and Exchange of GasesHemoglobin

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