MCQ
Contagium vivum fluidum was proposed by.
- A$D.J.$ Ivanowsky.
- ✓$M.W.$ Beijerinek.
- CStanley.
- DRobert Hook.
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$I$. Glucose $\rightarrow$ Lactic acid
$II$. Amino acids $\rightarrow$ Proteins
$(a)$ 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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