MCQ
$...........$ are devoid of respiratory, excretory and circulatory organs.
- AThreadworms.
- ✓Sponges.
- CTapeworms.
- DLiver fluke.
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$(i)$ 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.
$\begin{array}{|p{0.3\linewidth}|p{0.6\linewidth}|} \hline Column\,\,-I & Column\,\,-II \\ \hline A.\,\,Cytokinin & i.\,\,Stimulates\,\,closure\,\,of\,\,stomata \\ \hline B.\,\,Ethylene & ii.\,\,Increases\,\,stem\,\,length \\ \hline C.\,\,Gibberellin & iii.\,\,Promotes\,\,lateral\,\,shoot\,\,grow \\ \hline D.\,\,Abscisic\,\,acid & iv.\,\,Found\,\,in\,\,large\,\,amount\,\,in\,\,tissues\,\,undergoing\,\,senescence. \\ \hline \end{array}$
$a - b - c - d$
Choose the correct option for $A$ and $B$ to complete the given $NCERT$ statement