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
$1$ meter above the soil
$1.5$ meter above the soil
$2$ meters above the soil
$2.5$ meters above the soil
In stem which layer forms epidermal tissues
In plants like Nymphaea which is attached emerged hydrophyte, the stomata are present on
In a dicotyledonous stem, the sequence of tissues from the outside to the inside is