The next questions refer to the following data on blood types.

\begin{array} { l l l l } & \text { Case 1 } & \text { Case 2 } & \text { Case 3 } \\\hline \text { Mother } & \mathrm { A } , \mathrm { Rh } ^ { - } & \mathrm { O } , \mathrm { Rh } ^ { - } & \mathrm { AB } , \mathrm { Rh } ^ { + } \\\text {Fetus } & \mathrm { A } , \mathrm { Rh } ^ { + } & \mathrm { A } , \mathrm { Rh } ^ { - } & \mathrm { A } , \mathrm { Rh } ^ { - }\end{array}

Figure 43.2
-In Cases 1 and 2 in the table, the mothers would be able, if needed, to supply blood to the newborn even 7-9 months after birth; the same would not be True for Case 3. Why?
A)The fetus in Case 3 would provoke an immune response in the mother that would carry over after the birth.
B)The newborn in Case 3 would soon be able to make antibodies to the B antigen of the mother.
C)Newborn children, until about age 2, do not make appreciable antibodies, except against Rh+ antigen.
D)Passive immunity would have worn off for the third newborn, but not for the other two.
E)This difference is based on which of the mothers has been nursing their children, not on blood antigens.

Which of the Following Differentiates T Cells and B Cells

Multiple Choice

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