Name the blood cells,whose reduction in number can cause clotting disorder,leading to excessive loss of blood from the body.

Choose the incorrect sentence$(s)$.
$(I)$ $RBCs$ are formed in the white bone marrow in adults.
$(II)$ $RBCs$ have a red colour because of the presence of a protein called haemoglobin.
$(III)$ The nucleus is present in $RBCs$ in most mammals,and they are biconcave in shape.
$(IV)$ $A$ healthy individual has $12-16 \, g$ of haemoglobin in every $100 \, ml$ of blood.

$A$ person with antigens '$B$' in $RBC$ and antibodies '$a$' (anti-$A$) in the plasma belongs to the blood group

$A$ person having blood group $O$ can receive blood of:

Why do we consider blood as a connective tissue?

What is the medium of transport in higher organisms?