MCQ
$CO_2$ concentrating steps are found in
- ARice
- ✓Sugarcane
- CWheat
- DTomato
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$\begin{array}{|p{0.3\linewidth}|p{0.5\linewidth}|} \hline Column\,\,-I & Column\,\,-II \\ \hline A.\,\,Schleiden & 1.\,\,Nucleus \\ \hline B.\,\,Schwann & 2.\,\,German\,\,botanist \\ \hline C.\,\,Robert\,\,brown & 3.\,\,Living\,\,cell \\ \hline D.\,\,Leuwen\,\,hoke & 4.\,\,Britain\,\,Zoologist \\ \hline \end{array}$
$(i)$ Contractile vacuole takes part in osmoregulation and excretion.
$(ii)$ Food vacuole is formed by engulfing the food particles.
$(iii)$ The vacuole is bound by a double membrane called tonoplast.
$(iv)$ Vacuole can occupy upto $90$ percent of the volume of the cell.