MCQ
A component of xylem is
- ASieve tube
- BMedullary ray
- CSclerid
- ✓Tracheid
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Statements:
$A.$ On dry land it would die due to lack of O_2 if its mouth is forcibly kept closed for a few days.
$B.$ It has fourchambered heart.
$C.$ On dry land it turns uricotelic from ureotelic.
$D.$ Its lifehistory is carried out in pond water.