Question

Give reasons for
(a) Meristematic cells have a prominent nucleus and dense cytoplasm but they lack vacuole.
(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 tree.

Answer 1

(a) Meristematic cells undergo divisons and do not sotre food.
(b) They have lignin deposition in their walls to provide mechanical strength
(c) Pear fruit has stone cells or sclereids.
(d) Branches of a tree have collenchyma which provides them flexibility.
(e) Husk of coconut is composed of sclerenchyma and the sclerenchyma fibres are closely packed.