Which is not a function of epidermis?

Which is not a function of epidermis?

How does the cork act as a protective tissue?

$(a)$ Differentiate between meristematic and permanent tissues in plants.
$(b)$ Define the process of differentiation.
$(c)$ Name any two simple and two complex permanent tissues in plants.

Which of the following tissues has dead cells?

State whether the following statement is true or false:
In aquatic plants,large air cavities are present in parenchyma to give buoyancy to the plants to help them float.