Give reasons:
a) Meristematic cells have a prominent nucleus and dense
cytoplasm but they lack vacuole.
b) Intercellular spaces are absent in sclerenchymatous tissues.
c) Branches of a tree move and bend freely in high wind velocity.
d) it is difficult to pull out the husk of a coconut tree.
e) We get a crunchy and granular feeling when we chew pear
fruit.
Answers
Answer:Meristematic cells are continuously dividing cells so they have a prominent nucleus and dense cytoplasm. But since these cells do not store food material or waste materials, they lack vacuole
Intercellular spaces are absent in sclerenchymatous tissues because they have a cementing substance (known as lignin) around their cell membrane which makes them stiff and hard.
Branches of a tree move and bend freely in high wind velocity because of the presence of collenchyma that adds the property of flexibility
Walls of sclerenchyma cells are lignified, which make them thick. This tissue makes the plant hard and stiff. ... Such cells make it very hard to pull out the coconut husk
Sclereid is a reduced form of sclerenchyma, which has thickened lignified walls. In pear fruit, sclereid cells are present in bundles, which give a gritty texture to the fruit.
Answer:Meristematic cells are continuously dividing cells so they have a prominent nucleus and dense cytoplasm. But since these cells do not store food material or waste materials, they lack vacuole
Intercellular spaces are absent in sclerenchymatous tissues because they have a cementing substance (known as lignin) around their cell membrane which makes them stiff and hard.
Branches of a tree move and bend freely in high wind velocity because of the presence of collenchyma that adds the property of flexibility
Walls of sclerenchyma cells are lignified, which make them thick. This tissue makes the plant hard and stiff. ... Such cells make it very hard to pull out the coconut husk
Sclereid is a reduced form of sclerenchyma, which has thickened lignified walls. In pear fruit, sclereid cells are present in bundles, which give a gritty texture to the fruit.