MCQ
A component of xylem is
- ASieve tube
- BMedullary ray
- CSclerid
- ✓Tracheid
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

$R$ : The ribosomes of the chloroplast are smaller than cytoplasmic ribosomes.
| Column-$I$ | Column-$II$ |
| $A$. Leeuwenhoek | $I$. First saw and described a living cell |
| $B$. Robert Brown | $II$. Presence of cell wall is unique to plant cells |
| $C$. Schleiden | $III$. Discovered the nucleus |
| $D$. Schwann | $IV$. All plants are composed of different kind of cells |