MCQ
What is the type of coiling in $DNA$
- ✓Right-handed
- BLeft-handed
- CZig-Zag
- DOpposite
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$(a)$ secretion of secondary metabolities and their deposition in the lumen of vessels.
$(b)$ deposition of organic compounds like tannins and resins in the central layers of stem.
$(c)$ deposition of suberin and aromatic substances in the outer layer of stem.
$(d)$ deposition of tannins, gum, resin and aromatic substances in the peripheral layers of stem.
$(e)$ presence of parenchyma cells, functionally active xylem elements and essential oils.
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$II.$ Abscisic acid .....$B$..... the stomata.
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