Cork cells are made impervious to water and gases by the presence of

Give short answers:
$(i)$ What is the function of cambium?
$(ii)$ What is meant by lignin? Where is it present?
$(iii)$ What are the characteristics of cells of epidermis?

Parenchyma cells are

Which of the following tissues has dead cells?

Name the tissue which is present in the veins of leaves.

Match the column $(A)$ with the column $(B)$:

Column $(A)$	Column $(B)$
$(a)$ Parenchyma	$(i)$ Thin walled,packing cells
$(b)$ Photosynthesis	$(ii)$ Carbon fixation
$(c)$ Aerenchyma	$(iii)$ Localized thickenings
$(d)$ Collenchyma	$(iv)$ Buoyancy
$(e)$ Permanent tissue	$(v)$ Sclerenchyma