The number of $WBC$ per $mm^3$ of human blood is approximately:

The globulin proteins of blood plasma are primarily involved in which of the following?

Which test tube from the given options is $NOT$ used for keeping blood in a non-coagulated state for the analysis of blood corpuscles?

If the foetus is $Rh^+$ and the mother is $Rh^-$,then:

What is the main component of blood plasma?

Mature human $RBCs$ are enucleated. Which of the following is the most appropriate explanation for this?
$(i)$ They do not need to reproduce.
$(ii)$ They are somatic cells.
$(iii)$ They do not perform metabolism.
$(iv)$ Their internal space is available for $O_2$ transport.