The expanded part of the leaf is called the .......

In which of the following plants are sunken stomata found?

The leaf base is a modified form of .........

In $Acacia$ species,the first few leaves are pinnately compound. Then there are leaves with flattened petiole and fewer pinnae. The leaves of the adult plant have parallel-veined flattened petioles and no pinnae. It shows that:

Evergreen trees remain green throughout the year on account of

Pinnately parallel venation is found in