MCQ
A component of xylem is
- ASieve tube
- BMedullary ray
- CSclerid
- ✓Tracheid
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Here $A$ and $B$ refers to
| Column-$I$ | Column-$II$ |
| $A$. Bacteria without walls | $I$. Lysosome |
| $B$. Small circular DNA | $II$. Mycoplasma cells |
| $C$. Flattened sacs in | $III$. Thylakoid a chloroplast |
| $D$. A vesicle in which |
$IV$. Plasmid hydrolytic enzymes are stored |