The yolk of an egg in vertebrates is formed in the:

In which of the following pairs does erythroblastosis fetalis occur?

Match the following:

Column-$I$	Column-$II$ and Column-$III$
$X$. $RBC$	$R$. Lack of nucleus,$A$. $5-5.5$ Million
$Y$. Monocytes	$P$. Nucleated,$C$. $6-8\%$
$Z$. Eosinophil	$Q$. Granulocyte,$B$. $2-3\%$

What is the primary product of hemoglobin degradation?

You are required to draw blood from a patient and to keep it in a test tube for the analysis of blood corpuscles and plasma. You are provided with the following four types of test tubes. Which of them will you $NOT$ use for this purpose?

What is the difference between lymph and blood?