Anatomy of flowering plants

Meristems may be classified on the basis of

• origin and development

• position in plant body

• Functions

• All of above

The process of conversion of meristematic tissue to permanent cell is

• dedifferentiation

• undifferentiation

• differentiation

• none of the above

I. These tissues are found as layers or patches.

II. lt consists of cells which are thickened at the corners.

llI. It often contains chloroplast.

IV. Intercellular spaces are absent.

V They provide mechanical support to growing parts of plants.

The above characters are attributed to

• vascular tissue

• collenchyma

• parenchyma

• sclerenchyma

.Sclerenchyma fibres are

• thick-walled

• elongated

• pointed cells

• All of these

A mature sieve tube differs from vessel in

• being nearly dead

• lacking cytoplasm

• Iacking a functional nucleus

• absence of lignified walls

Cuticle is not present in which part of plant?

• Leaves

• Root

• Stem

• Pneumatophores

Select the correct statements.

I. Epidermal cells have small amount of cytoplasm and a large vacuole.

II. Waxy layer cuticle is absent in roots.

IIl. Root hairs are unicellular, while stem hairs /trichomes are multicellular.

IV Trichomes are branched & unbranched, soft stiff and secretory or transpiration preventive.

V Guard cells are dumb-bell-shaped in dicots and bean-shaped in monocots (e.g. grass).

• ) All except I and II

• All except III

• All except Il and IV

• All except V

Medullary rays are formed by the

• radially placed parenchymatous cells between vascular bundles

• longitudinally placed parenchymatous cells between vascular bundles

• laterally placed parenchymatous cells between vascular bundles

• obliquely placed parenchymatous cells between vascular bundles

• A

• B

• C

• D

• A

• B

• C

• D