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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.
(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.
a. cells have a prominent nucleus and a dense cytoplasm, dividing continuously. They don't need vacuoles because they continuously divide and don't need to store food or waste.
b. Sclerenchyma lacks intercellular spaces because of its . These are tightly packed and provide the plant with mechanical strength and protection.
c. Sclerenchyma tissue is the cause of the crunchy and granular feeling you get when you chew a pear fruit. Both cells make up the Sclerenchyma. Because they support and harden the tissue, sclereids give the pears' fruits a crunchy texture.
d. Because is present and contributes to flexibility, tree branches can freely move and bend in high winds.
e. The , or hard husk, of the coconut tree. The husk of a coconut tree is, therefore, hard to remove.
Answer variants:
fibre and sclereid
sclerenchyma
lignified cell wall
Meristematic tissue
collenchyma
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