Give reasons for

(a) Meristematic cells have a prominent nucleus and dense cytoplasm but they lack vacuoles

(b) Intercellular spaces are absent in sclerencytmatous tissue

(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 coconut.

(a) Meristemtic tissue is responsible for the growth of plants hence they have actively dividing cells which have prominent nucleus and dense cytoplasm. They do not store food and hence they lack vacuoles.

(b) The cells of this tissue are dead, long and narrow as the walls are thickened due to lignin. These walls are so thick that there is no intercellular space in the tissue.

(c) The grit of pear is formed of stone cells also known as sclereids.

(d) Collenchyma tissue provides flexibility to plants so that they can easily bend without breaking. (e) Husk of a coconut is made up of sclerenchymatous fibres which are tightly packed.