Phloem Fiber

Q.

Which are generally absent in the primary Phloem of Angiosperms?

1. Sieve tube cells

2. Companion cells

3. Bast fibres

4. Parenchyma

Q.

Fibres are likely to be absent in

(a) secondary phloem

(b) secondary xylem

(c) primary phloem

(d) leaves

Q. Which of these belongs to same family?

1. Cotton, hemp, china rose, lady’s finger
2. Cotton, hemp, china rose, brinjal
3. Cotton, hemp, china rose, tobacco
4. Cotton, hemp, china rose, rose

Q.

The commercial jute fibres are obtained from

1. Intercalary fibres

2. Xylem fibres

3. Phloem fibres

4. None of these

Q.

Which species of bacteria are used in the separation of fibers of jute?

Q. of jute, hemp and flax are used to make ropes.

1. Sieve tube elements
2. Companion cells
3. Phloem parenchyma
4. Phloem fibres

Q. Jute is a:

1. Bast fibre from secondary xylem
2. Bast fibres from primary xylem
3. Bast fibres from secondary phloem
4. Bast fibres from primary phloem

Q.

Below is a list of plant fibres. From which part of the plant these are obtained

(a) coir

(b) hemp

(c) cotton

(d) jute

Q.

Give the main functions of fibres.

Q. Flax and hemp are fibres obtained from

1. phloem
2. pericarp
3. xylem
4. cortex

Q.

Which are generally absent in the primary Phloem of Angiosperms?

1. Sieve tube cells

2. Companion cells

3. Bast fibres

4. Parenchyma

Q. Jute is a:

1. Bast fibre from secondary xylem
2. Bast fibres from primary xylem
3. Bast fibres from secondary phloem
4. Bast fibres from primary phloem

Q. From which part of Cocos nucifera, coir is obtained?

1. Epicarp
2. Any part of fruit
3. Endocarp
4. Mesocarp

Q. Jute is obtained from a plant which belongs to a family ________.

1. Tiliaceae
2. Sterculiaceae
3. Malvaceae
4. Euphorbiaceae

Q.

Jute is mainly composed of

1. xylem

2. secondary bast fibre

3. cortex

4. phloem

Q. Simplest most primitive stele is _____________.

1. Atactostele
2. Protostele
3. Dictyostele
4. Stenotele

Q. Jute is a

1. Bast fibre from secondary xylem
2. Bast fibre from secondary phloem
3. Bast fibre from primary phloem
4. Bast fibre from primary xylem

Q. Which one of the following is a source of textile fiber?

1. Crotolaria juncea
2. Gossypium herbaceum
3. Hibiscus cannabinus
4. Cassia occidentalis

Q. The flax fibre, the bast fibre or phloem fibres are obtained from

1. Cannabis sativa
2. Crotalaria juncea
3. Cocos nucifera
4. Linum usitatissimum

Q. Cotton fibres are

1. Bark fibres
2. Phloem fibres
3. Pericycle fibres
4. Epidermal fibres

Q. of jute, hemp and flax are used to make ropes.

1. Sieve tube elements
2. Companion cells
3. Phloem parenchyma
4. Phloem fibres

Q. Jute is used as a stuffing in life jackets and pillows. Explain.

Q.

38. (c) Which part of Jute plant have fibres?

Q. Coir is obtained from the kapok tree. Explain.

Q. Cotton fibres are derived from

1. Pericarp
2. Phloem
3. Pericycle
4. Testa

Q. Lint and Fuzz are characteristics of the fibres of __________.

1. Flax
2. Jute
3. Cotton
4. Coir

Q. Anatomically jute fibres are

1. xylem fibres
2. cortical fibres
3. pith fibres
4. secondary bast or phloem fibres