MCQ
$SAN$ can generate impulses
- ✓$70-75 \,min^{-1}$
- B$50-55 \,min^{-1}$
- C$100-150 \,min^{-1}$
- D$35-40 \,min^{-1}$
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$A$. Lenticels are the lens-shaped openings permitting the exchange of gases.
$B$. Bark formed early in the season is called hard bark.
$C$. Bark is a technical term that refers to all tissues exterior to vascular cambium.
$D$. Bark refers to periderm and secondary phloem.
$E$. Phellogen is single-layered in thickness.
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