A-LevelBiologyImmunity9700/12 · Feb/Mar 2019 · Q401 Mark
The graph shows the changes that occur in the concentration of antibodies in the blood of a baby before birth and during the first few months after birth. [Figure shows a graph of antibody concentration vs time/months with curves for total antibodies, antibodies made by baby, and antibodies from mother] Which description about the changes in immunity during the first few months after birth is correct?
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Aactive artificial immunity decreases, active natural immunity increases
Bactive natural immunity decreases, active artificial immunity increases
Cpassive artificial immunity decreases, active natural immunity increases
Dpassive natural immunity decreases, active natural immunity increases
✓ Correct answer
D: passive natural immunity decreases, active natural immunity increases
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