Companion cells in plants are associated with

  • vessels

  • sperms

  • sieve elements

  • guard cells.

Cork cambium results in the formation of cork which becomes impermeable to water due to the accumulation of

  • resins

  • suberin

  • lignins

  • tannins

Which one of the following statements pertaining to plant structure is correct?

  • Cork lacks stomata, but lenticels carry out transpiration.

  • Passage cells help in transfer of food from cortex to phloem.

  • Sieve tube elements possess cytoplasm but no nuclei.

  • The shoot apical meristem has a quiescent centre.

Grafting is successful in dicots but not in monocots because the dicots have

  • Vascular bundles arranged in a ring

  • Cambium for secondary growth

  • Vessels with elements arranged end to end

  • Cork cambium

In the sieve elements, which one of the following is the most likely function of P-proteins?

  • Deposition of callose on sieve plates

  • Providing energy for active translocation

  • Autolytic enzymes

  • Sealing mechanism on wounding

Bark refers to 

  • Phellem + Phellogen + Phelloderm

  • Periderm + Cortex

  • Phellem + Phelloderm + Secondary phloem

  • Periderm + Cortex + Pericycle + Secondary phloem

The branched sclereids present in hydrophytes are:-

  • osteosclereids

  • trichosclereids

  • macrosclereids

  • astrosclereids

Why are vascular bundles closed in monocots?

  • Xylem and Phloem are present

  • Xylem and phloem occur in separate bundles

  • Vascular cambium is present between xylem and phloem

  • Vascular cambium is not present

Given figure shows:-

(a) structure of lenticel
(b) hydathode showing gaseous vapour exchange
(c) fungus reproducing by spore formation
(d) algae reproducing by spore formation
  • 1
  • 2
  • 3
  • 4

Select the correct pair amongst the following.

  • Spring wood  - light colour, high density

  • Spring wood  - dark colour, low density

  • Autumn wood - light colour, high density

  • Autumn wood - dark colour, high density

As secondary growth proceeds, in a dicot stem, the thickness of.

  • sapwood increases

  • heartwood increases

  • both sapwood and heartwood increases

  • both sapwood and heartwood remains the same

The desert grasses, often curls their leaf to minimise water loss due to presence of 

  • Spines

  • Palisade parenchyma

  • Bundle sheath cells

  • Bulliform cells

Tyloses are balloon-like outgrowths in the lumen of secondary xylem tracheids and vessel of duramen region. These are actually:-

  • outgrowth of vessels of xylem

  • ingrowth of vessels

  • outgrowth of parenchymatous cell

  • swelling of xylem fibres for no function

Pith cavity occurs in the stem of ?

  • Helianthus

  • Zea mays

  • Cucurbita   

  • Dracaena

Match the Column I and II.

Column I

Column II

A.  Bulliform cells

1.   Stomata

B.  Guard cells

2.   Aerating pore

C.  Lenticels

3.   Accessory cells

D.  Subsidiary cell

4.   Isobilateral cells


        A  B  C  D

  • (a)   1   2  3   4
  • ()   3   1  2   4
  • (c)   4   1  2   3
  • ()   4   3  2   1

Root cambium is derived from?

  • primary meristem

  • secondary meristem

  • intercalary meristem

  • apical meristem

Which one of the following comprises only simple tissue?

  • A. Prenchyma, Collenchyma and Sclerenchyma

  • B. Parenchyma, Xylem and Collenchyma

  • C. Parenhyma, Xylem and Sclerenchyma

  • D. Parenchyma, Xylem an Phloem

Match the following

A. Meristem i. Photosynthesis, storage
B. Parenchyma ii. mechanical support
C. Collenchyma iii. Actively dividing cells
D. Sclerenchyma iv. stomata
E. Epidermal tissue v. Sclereids

  • . A-i, B-iii, C-v, D-ii, E-iv

  • . A-iii, B-i, C-ii, D-v, E-iv

  • . A-ii, B-iv, C-v, D-i, E-iii

  • . A-v, B-iv, C-iii, D-ii, E-i

What is the destiny of primary xylem in a dicot root showing extensive secondary growth?

  • A. It is retined in the centre of the axis

  • B. It gets crushed

  • C. May or may not get rushed

  • D. It gets surrouned by primary phloem

Which one of the following cell types always give rise to secondary cortex?

  • A. fusiform initil cells

  • B. root cap

  • C. protoderm

  • D. Phellogen

While removing the skin of a potato tuber, we remove

  • . Periderm

  • . Epidermis

  • . Cuticle

  • . Sapwood

In which of the following pairs of parts of a flowering plant is epidermis absent?

  • A. Root tip nd shoot tip

  • B. Shoot ud and floral bud

  • C. Ovule and seed

  • D. Petiole an pedicel

Epiblema of roots is same as

  • . Pericycle

  • . Endodermis

  • . Epidermis

  • . Stele

Match the following

A.Cuticlei. guard cells
B. Bulliform cellsii. single layer
C. Stomataiii. waxy layer
D. Epidermisiv. empty colourless cell

  •  . A-iii, B-iv, C-i, D-ii

  • . A-i, B-ii, C-iii, D-iv

  • . A-iii, B-ii, C-iv, D-i

  • . A-iii, B-ii, C-i, D-iv

Identify the tissue system from among the following

  • A. Prenchyma

  • B. Xylem

  • C. Epidermis

  • D. Phloem

A conjoint and open vascular bundle will be observed in the transverse section of

  • . Monocot root

  • . Monocot stem

  • . Dicot root

  • . Dicot stem

Anatomically fairly old root is distinguished from dicotyledonous stem by

  • . Position of Protoxylem

  • . Absence of secondary xylem

  • . Absence of secondary phloem

  • . Presence of cortex

Which of the following is correct

1. Uneven thickening of cell wall is characteristic of sclerenchyma

2. Periblem forms cortex of stem and root

3. Tracheids are chief water conducting element in gymnosperms

4. Companion cell is devoid of nucleus at maturity

  • . 2,3

  • . 1,4

  • . 1,2

  • . 4

The term bark means

  • A. Phellem, phelloderm nd vascular cambium

  • B. Phellem, Phellogen, phelloderm and secondary phloem

  • C. Periderm and seondary xylem

  • D. Cork cambium an cork

Axillary bud and terminal are derived from

  • A. Lteral meristem

  • B. Intercalary meristem

  • C. Apial meristem

  • D. Parenchyma

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Practice Botany Quiz Questions and Answers