Sclerenchyma

Q. Tissue cells commonly found in fruit wall of nuts and pulp of some fruits like guava are called

1. fibres
2. sclereids
3. tracheids
4. vessels

Q. Lumen is highly reduced in

1. collenchyma
2. parenchyma
3. sclerenchyma
4. meristems

Q. Sclereids are also known as .

Q. The stem of submerged hydrophytes is soft and weak due to:

1. Absence of xylem
2. Absence of aerenchyma
3. Reduced mechanical tissue and xylem
4. Absence of phloem

Q. Tissue cells commonly found in fruit wall of nuts and pulp of some fruits like guava are called

1. fibres
2. sclereids
3. tracheids
4. vessels

Q. What is/are the function(s) of the sclerenchyma cells in plants?

1. Storage of food and water
2. Protecting the plant
3. Provide texture to fruit pulp
4. Provide mechanical strength

Q. Which of the following cells in plants are said to be non-living?

1. Meristem​
2. Parenchyma​
3. Collenchyma
4. Sclerenchyma

Q. Fill in the blanks.

The process of taking up permanent shape, size and function by tissues is known as ____________.

Q. Fill in the blanks.

Sclereids are also known as _________.

Q. Medullary rays are made up of.

1. Sclerenchyma cells
2. Tracheids
3. Fibres
4. Parenchymatous cells

Q.

Providing mechanical support is the only function of sclerenchyma cells.

1. True

2. False

Q. The gritty nature of the pulp of fruits like pear and sapota is due to the presence of:

1. Macrosclereids
2. Astrosclereids
3. Osteosclereids
4. Brachysclereids

Q. The mechanical properties of sclerenchyma is due to

1. cellulose
2. pectin
3. lignin
4. suberin

Q.

Which is simple dead mechanical tissue?

1. Parenchyma

2. Collenchyma

3. Sclerenchyma

4. Xylem

Q.

Other than the stem, where could you find sclerenchyma?

1. Leaf

2. Flower

3. Shoot tip

4. Fruit pulp

Q.

Which is simple dead mechanical tissue?

1. Collenchyma

2. Sclerenchyma

3. xylem

4. parenchyma

Q.

Sclerenchymatous bundle sheath is present in:

1. Grass

2. Mango

3. Banyan

4. Apple

Q.

Sclerenchymatous bundle sheath is present in:

1. Apple

2. Grass

3. Mango

4. Banyan

Q. Multiseriate vascular rays opposite to protoxylem occur in

1. Old dicot root
2. old dicot stem
3. both old dicot root & old dicot stem
4. old stem of palms

Q. What chemical substance is deposited in the secondary wall of sclerenchyma?

1. Myelin
2. Lignin
3. Lymph
4. Collagen

Q. The deposition of one of the following in plant cells make them impervious to gases and water

1. Hemicellulose
2. Suberin
3. Pectin
4. Cellulose

Q.

Which cells provide mechanical strength to the plant?

Q. Tissue cells commonly found in fruit wall of nuts and pulp of some fruits like guava are called

1. fibres
2. sclereids
3. tracheids
4. vessels

Q. Assertion :The thallus of Riccia is internally differentiated into an upper photosynthetic region and lower storage region. Reason: The lower storage region is formed from parenchymatous cells.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Both Assertion and Reason are incorrect

Q. In barley stem, vascular bundles are

1. Open and scattered
2. Closed and scattered
3. Open and in a ring
4. Closed and radial

Q. Assertion :Idioblasts are derived from parenchyma. Reason: Secretory cells are modified parenchyma

1. If both the assertion and the reason are true and the reason is a correct explanation of the assertion
2. If both the assertion and reason are true but the reason is not a correct explanation of the assertion
3. If the assertion is true but the reason is false
4. If both the assertion and reason are false

Q. The grittiness of pulp of wood apple is due to

1. Macrosclereids
2. Brachysclereids
3. Osteosclereids
4. Astrosclereids

Q. What is/are the function(s) of the sclerenchyma cells in plants?

1. Storage of food and water
2. Protecting the plant
3. Provide texture to fruit pulp
4. Provide mechanical strength

Q. The stem of submerged hydrophytes is soft and weak due to:

1. Absence of xylem
2. Absence of aerenchyma
3. Absence of phloem
4. Reduced mechanical tissue and xylem

Q. When strong wind blows, the plants bend down and then again become erect. This flexibility in plants is due to _____________.

1. Parenchyma
2. Sclerenchyma
3. Collenchyma
4. Chlorenchyma