Select incorrect statement with respect to the anatomy of monocot stem

1. Parenchymatous ground tissue is extended from hypodermis to center

2. Hypodermis is made of thick-walled living mechanical tissue

3. Vascular bundles are conjoint, collateral and closed with endarch xylem

4. Pith is absent

In parenchyma, all cells are isodiametric and

1. Thin-walled

2. Thick-walled

3. Lignified-walled

4. Devoid of intercellular spaces

Tissue which provides mechanical strength and flexibility to young dicot stem is present in

1. Pith

2. Endodermis

3. Hypodermis

4. Cortex

The ground tissue system is constituted by all off these, except

1. Medullary rays

2. Pericycle

3. Mesophyll

4. Xylem

Conjoint, collateral, closed vascular bundles without phloem parenchyma are found in plants which have

1. Differentiated ground tissue in the stem

2. Dedifferentiated pericyclic structure in the mature root

3. Sclerenchymatous hypodermis in stem

4. Developed pith in stem

The tissue belonging to bark but not to periderm is

1. Vascular cambium

2. Secondary phloem

3. Phellem

4. Secondary cortex

Which of the following is correct with respect to lenticels?

a. Phellogen forms parenchymatous cells on the outer side

b. It is a lens-shaped opening

c. Helps in exchange of gases

d. Present mostly in woody trees

1. a & b correct

2. c & d correct

3. b, c, & d correct

4. All are correct 

Identify the incorrect match with respect to wood characters given in A, B, C column

                                  A                       B                        C

Select the incorrect statement with respect to late wood

1. It forms a narrow strip in annual rings

2. Has smaller and narrower vessels

3. Darker in colour

4. Fibres are less

Which of the following is not the component of secondary phloem?

1. Protophloem

2. Bast fibers

3. Companion cells

4. Phloem parenchyma