MCQ
A mature sieve tube differs from vessel in
- ABeing nearly dead
- BLacking cytoplasm
- CLacking a functional nucleus
- ✓Absence of lignified walls
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$I.$ $IAA$ $II.$ $G A_{3}$ $III.$ $Zeatin$ $IV.$ $ABA$
$a$. Large and more numerous nucleoli are present in cells actively carrying out protein synthesis.
$b$. Nuclear pores allow bidirectional movement of molecules.
$c$. Cytoskeleton is a glycolipid structure for mechanical support, motility and maintenance of the shape of the cell.
$d$. Steroidal hormones are synthesized by Golgi complex.