
The grittiness of pulp of wood apple is due to
a) Macrosclereids
b) Brachysclereids
c) Osteosclereids
d) Astrosclereids
Answer
474.6k+ views
Hint: Sclereids are the type of sclerenchyma tissues. They are highly thickened dead cells along with very narrow cavities. They are usually found in the pulp of fruits like guava, pear; fruit wall of nuts and also in seed coats of legumes.
Complete Answer:
The important function of sclerenchyma tissue is to provide mechanical support. Types of sclereids are
1) Brachysclereids: Resemble parenchyma cells in shape, but are made of secondary cells.
They form the "grit" and hence these non living cells are also called as stone cells
2) Macrosclereids: They are elongated sclereids usually present in the outer layer in the seed coat of legume seeds.
They are responsible for restricting water uptake by hard-seeded legumes.
3) Osteosclereids: They have columnar cells similar to macrosclereids except they are enlarged at the ends that resemble the bone. So they are also called bone cells or hour-glass cells.
Macerated pea seed coats show groups of osteosclereids.
4) Astrosclereids: They are pointed, irregular, branched sclereids. They are unique types of sclereids.
They are found in specialized tissues like the floating leaves of water lilies.
5) Trichosclereids: These types of cells are long and tubular in structure.
They are present in the aerial roots of the Swiss cheese plant and leaves of olive.
Hence the correct answer is (b) Brachysclereids.
Note: Presence of large quantities of sclereids in the plants forms the core of the fruits as well as they are responsible for the gritty texture.
Complete Answer:
The important function of sclerenchyma tissue is to provide mechanical support. Types of sclereids are
1) Brachysclereids: Resemble parenchyma cells in shape, but are made of secondary cells.
They form the "grit" and hence these non living cells are also called as stone cells
2) Macrosclereids: They are elongated sclereids usually present in the outer layer in the seed coat of legume seeds.
They are responsible for restricting water uptake by hard-seeded legumes.
3) Osteosclereids: They have columnar cells similar to macrosclereids except they are enlarged at the ends that resemble the bone. So they are also called bone cells or hour-glass cells.
Macerated pea seed coats show groups of osteosclereids.
4) Astrosclereids: They are pointed, irregular, branched sclereids. They are unique types of sclereids.
They are found in specialized tissues like the floating leaves of water lilies.
5) Trichosclereids: These types of cells are long and tubular in structure.
They are present in the aerial roots of the Swiss cheese plant and leaves of olive.
Hence the correct answer is (b) Brachysclereids.
Note: Presence of large quantities of sclereids in the plants forms the core of the fruits as well as they are responsible for the gritty texture.
Recently Updated Pages
Master Class 11 Accountancy: Engaging Questions & Answers for Success

Express the following as a fraction and simplify a class 7 maths CBSE

The length and width of a rectangle are in ratio of class 7 maths CBSE

The ratio of the income to the expenditure of a family class 7 maths CBSE

How do you write 025 million in scientific notatio class 7 maths CBSE

How do you convert 295 meters per second to kilometers class 7 maths CBSE

Trending doubts
The Equation xxx + 2 is Satisfied when x is Equal to Class 10 Maths

Why is there a time difference of about 5 hours between class 10 social science CBSE

Change the following sentences into negative and interrogative class 10 english CBSE

What constitutes the central nervous system How are class 10 biology CBSE

Write a letter to the principal requesting him to grant class 10 english CBSE

Explain the Treaty of Vienna of 1815 class 10 social science CBSE
