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WAEC Biology 2021 Question 43

Question 43

Transport in Animals

A mixture of blood with antigen A and blood containing antibody a will

  1. A.lead to agglutination.
  2. B.facilitate dissolution of clot.
  3. C.have no effect on blood composition.
  4. D.change the blood group.
Show the answer and explanation

Answer: A (lead to agglutination.)

Explanation

Antibody a (anti-A) reacts with antigen A and makes the red cells clump together (agglutination).