Monocot stems do not have

1. Protophloem

2. Phloem parenchyma

3. Companion cell in phloem

4. Sieve tube and metaphloem

Choose the correct option with respect to sclereids

1. Physiologically active

2. Pits are present

3. Derived from meristems directly

4. Little amount of protoplasm is present

The isobilateral leaf is characterized by all the given characteristics, except

1. Vascular bundles are always closed

2. Xylem is towards the adaxial surface of leaf

3. Mesophyll cells are not differentiated

4. Parenchymatous extensions of the bundle sheath

Collenchyma is characterised by

1. Absence of protoplast at maturity

2. Supporting young stem and leaf petiole

3. Lignocellulosic thickening on secondary walls

4. The common presence of intracellular spaces

Epidermal hairs on stems known as trichomes

1. May sometimes be secretory in function

2. Have vascular supply

3. May be soft or stiff but unbranched always

4. Are endogenous in origin like lateral roots

Select the incorrect statement with respect to bast fibres

a. Generally absent in primary phloem

b. Elongated, branched with blunt ends

c. Parenchymatous in nature

d. Becomes dead at maturity

1. a & d

2. b & d

3. b & c

4. a & b

Sieve tube elements are long, tube-like structures, arranged longitudinally and associated with the companion cells. A mature sieve element

1. Has a small vacuole

2. Lacks nucleus and cytoplasm

3. Possesses a large vacuole and small nucleus

4. Possesses a peripheral cytoplasm

Match the column I with column II

1. a(i), b(ii), c(iii), d(iv)

2. a(ii), b(iv), c(iii), d(i)

3. a(iii), b(iv), c(i), d(ii)

4. a(iii), b(ii), c(i), d(iv)

Which of the following component of phloem is mainly responsible for the storage of food material and other substances like resins, latex and mucilage?

1. Sieve tube

2. Companion cell

3. Bast fibres

4. Phloem parenchyma

Living mechanical tissue with a thickening at the cells corners possess deposition of

1. Lignin

2. Cellulose and pectin only

3. Cellulose, hemicellulose and pectin

4. Cellulose only