Articulated laticifers or latex vessels are prominent in
Papaver
Calotropis
Banana
Euphorbia
Trees at sea do not have annual rings because
Commercial cork is obtained from
A nail is driven into the trunk of a $30$ year old tree at a point $1$ meter above the soil level. The tree grows in height at the rate of $0.5$ meters a year. After three years, the nail will be
$P -$ protein is found in
Quiescent centre is found in