MCQ
The enzyme which fixes $CO_2$ in $C_4$ plants is
- AHydrogenase
- ✓$PEP$ carboxylase
- CReductase
- D$RuBP$ carboxylase
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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.
Choose the correct answer from the options given below:
$II.$ The neural system provides an organized network of point to point connection for a quick coordination.
$III.$ The neural organization is very complex in lower invertebrates.
$IV.$ The human neural system includes $CNS$ and $PNS$
Select the correct statements.