STD 11 - 5. Morphology flowering plants — BIOLOGY STD 11 Science — Question

$(I)$ $RBCs$ are formed in the white bone marrow in adults.

$(II)$ $RBCs$ have red colour because presence of protein called haemoglobin.

$(III)$ Nucleus is present in $RBC$ in most of the mammals and are biconcave in shape.

$(IV)$ A healthy individual has $12 -16\, gms$ of haemoglobin in every $1000\, ml$ of blood.