1.

Why does blood appear red?

A.  Because of a substance called haemoglobin present in the Red Blood Cells
B.  Because of a substance called chlorophyll present in the Red Blood Cells
C.  Because of a substance called haemoglobin present in the White Blood Cells
D.  Because of a substance called chlorophyll present in the White Blood Cells
Answer» B.  Because of a substance called chlorophyll present in the Red Blood Cells


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