Mammals have biconcave $RBCs$. The physiological advantage of this shape is:

$A$ woman of blood group $O$ presented a baby of blood group $O$ which she claimed as her child. She brought a suit against a man of $AB$ blood group as the father of the child. Which statement is correct as per your judgement?

Three children in a family have blood types $O$,$AB$ and $B$ respectively. What are the genotypes of their parents?

Differentiate between: Basophils and Eosinophils.

Which of the following blood cells in humans is known to be enucleated (lacking a nucleus)?

Which of the following are the macrophages of the spleen?