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.
ScienceClass 9CBSEAnswered 27 Mar 2026
Answer
- Meristamatic tissue cells are continuously dividing and they have prominent nucleus and a dese cytoplasm. Since they are diving rigorously they need not store food or waste products hence they lack
- Cellwall of sclerenchyma are lignified and are packed densely to protect the plant and to give mechanical strength hence intercellular spaces are absent in sclerenchymatous tissues.
- In pear fruit sclerenchyma cells are called stone They are small, thick and hard. Because of this We get a crunchy and granular feeling, when we chew pear fruit.
- Junction of the tree branch composed of collenchyma cells which provide rigidity and flexibility to the branches. Hence Branches of a tree move and bend freely in high wind velocity.
- Husk of coconut tree is sclerenchyma which is Hence it is difficult to pull out the husk of a coconut tree.
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