MCQ
The solubility of $CO _{2}$ in the blood is
- A$10-15$ times higher than that of $O_{2}$
- ✓$20-25$ times higher than that of $O _{2}$
- CSlightly higher than that of $O_{2}$
- DSlightly lower than that of $O_{2}$
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$II.$ It consists of cells which are thickened at the corners
$III.$ It often contains chloroplast
$IV.$ Intercellular spaces are absent
$V.$ They provide mechanical support to growing parts of plants The above characters are attributed to