- ACork have no stomata, but lenticels carry out transpiration
- BPassage cells help in transfer of food from cortex to phloem
- ✓Sieve tube elements posses cytoplasm but not nuclei
- DThe shoot apical meristem has a quiescent centre
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
$I.$ Each actin (thin filament) is made up of $2 \mathrm{~F}$ (filamentous) actins
$II.$ $F-$actin is the polymer of G (globular) actin
$III.$ $2 \mathrm{~F}=$ actins are twisted into a helix
$IV.$ Two strands of tropomyosin (protein) lies in the grooves of $F-$actin
The correct option is
$‘A’ $ $ ‘B’$
$(1) $ Auxin $(I)$ Ripening and maturity of fruits
$(2)$Gibberellin $(II)$Differentiation of xylem elements
$(3) $ Cytokinin $(III)$ Prevention of genetic and physiological dwarfism
$(4) $ Ethylene $(IV)$ Found from tumour tissue of tobacco
$(1)$ $(2)$ $(3)$ $(4)$