Give reasons for:
$(a)$ Meristematic cells have a prominent nucleus and dense cytoplasm but they lack vacuoles.
$(b)$ Intercellular spaces are absent in sclerenchymatous tissues.
$(c)$ We get a crunchy and granular feeling when we chew pear fruit.
$(d)$ Branches of a tree move and bend freely in high wind velocity.
$(e)$ It is difficult to pull out the husk of a coconut.

(N/A) Meristematic cells are actively dividing cells. $A$ prominent nucleus and dense cytoplasm are required to support rapid metabolic activity and cell division. Vacuoles are absent because these cells do not need to store food or maintain turgidity for structural support.
$(b)$ Sclerenchymatous cells have thick,lignified cell walls that are tightly packed together,leaving no intercellular spaces.
$(c)$ Pear fruit contains specialized sclerenchyma cells known as stone cells or sclereids,which provide a gritty and granular texture.
$(d)$ Collenchyma tissue is present in the stalks and branches of plants. It provides both structural support and flexibility,allowing branches to bend without breaking in high wind.
$(e)$ The husk of a coconut is made of sclerenchyma tissue,which is dead and heavily lignified,making it extremely hard and tough to remove.