$A$ doctor suggested a couple not to have more than one child because:

  • A
    Male is $Rh^{+}$ and female is $Rh^{-}$
  • B
    Male is $Rh^{-}$ and female is $Rh^{+}$
  • C
    Male is $Rh^{-}$ and female is $Rh^{-}$
  • D
    Male is $Rh^{+}$ and female is $Rh^{+}$

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Prothrombin is a

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.

Identify the most abundant phagocytic cells found in the blood.

What is the difference between lymph and blood?

Their count is about $2-3$ percent of the total white blood cell count in the blood.

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