MCQ
Instantaneous source of energy is
- AProtein
- BLipid
- CFats
- ✓Glucose
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| Types of cells (Langerhans) | Hormones |
| $\alpha$ - cells secrete | $A$ |
| $\beta-$ cells secrete | $B$ |
| $\delta$ - cells secrete | $C$ |
$A$. 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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