Anatomy - 05-08-23

Which of the following statements is incorrect about sclereids (stone cells)

• Variously shaped

• Highly thickened + lignified cell wall and lumen is narrow

• Commonly found in the fruits, wall of nuts, seed coats of legumes and leaves

• They are types of parenchyma

Xylem –

• Functions as conducting tissue for water and minerals from root to the stem and leaves

• Provides mechanical strength to plant parts

• Both

• Is absent in pteridophytes

Xylem in angiosperms consists of how many types of elements?

• 4

• 3

• 2

• 1

Vascular bundle having cambium between the xylem and phloem is called –

• Close vascular bundle

• Open vascular bundle

• Conjoint vascular bundle

• Radial vascular bundle

In dicot root, initiation of lateral root, and vascular cambium during secondary growth takes place from –

• Cortex

• Epidermis

• Pericycle

• Xylem

The innermost layer or last layer of cortex is called –

• Pericycle

• Conjunctive tissue

• Endodermis

• Exodermis

I. Unicellular hair

II. Endodermis with passage cells

III. Pith-small / inconspicuous

IV. Radial vascular Bundle

V. Xylem-exarch

VI. 2 - 4 xylem and phloem

The above description refers to which of the following –

• Monocot root

• Dicot root

• Monocot stem

• Dicot stem

Monocot root differs from dicot root in having –

• Polyarch xylem bundles

• Large and well developed pith

• Both

• Radial vascular Bundle and exarch xylem

In root, the tangential as well as radial walls of the barrel-shaped endodermal cells have a deposition of water impermeable, waxy material-suberin in the form of –

• Cuticle strips

• Protein strips

• Casparian strips

• Silicious strips

Interfascicular cambia originate from cells of –

• Medullary ray

• Cortex

• Endodermis

• Fascicular cambia