MCQ
Formation of periderm is the function of:
- AVascular cambium
- BCork cambium
- CBoth vascular and cork cambium
- DNone
Explanation:
The cork cambium is the lateral meristem which causes secondary growth and replaces the epidermis of the roots and stems upon maturation.
Vascular cambium gives rise to new vascular tissue in plants.
The vascular tissues are tubes that transport water and nutrients up and down the plant.
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$(i)$ The shape of the cells may vary with the function they perform.
$(ii)$ Human $RBC$ is about $7.0\; mm$ in diameter.
$(iii)$ Cytoplasm is the main area of cellular activities.
$(iv)$ Various chemical reactions occur in cytoplasm to keep the cell in the living state.
| List $I$ | List $II$ |
| $A$. $P$-wave | $I$. Beginning of systole |
| $B$. $Q$-wave | $II$. Repolarisation of ventricles |
| $C$. $QRS$ complex | $III$. Depolarisation of atria |
| $D$. $T$-wave | $IV$. Depolarisation of ventricles |
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