MCQ
Protonema occurs in the life cycle of:
- ARiccia.
- ✓Funaria.
- CChlamydomonas.
- DSpirogyra.
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$R :$ These have aglomerular kidney $i.e.$, no filtration occurs and tubular secretion is the only way of excretion.
$(I)$ $RBCs$ 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.