MCQ
Heart rate is increased by all the following except
- AAnoxia
- BModerate $C{O_2}$ excess
- CElevated body temperature
- ✓Increased intracranial pressure
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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