Which one of the following is well-developed present in hydrophytes?
Aerenchyma
Collenchyma
Stomata
Root system
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
Sclereids are commonly found in the
$I.$ fruits wall of nuts
$II.$ pulp of fruit like guava and pear
$III.$ seed coat of legumes
$IV.$ micropile of pea
Select the correct combination
Ectophloic siphonostele is found in
Choose the incorrect statement