Identify the correct statement regarding collenchymas in plants:-

  • They occur in layers below the epidermis of monocotyledonous plants.

  • Cells are much thickened at the corners due to the deposition of lignin.

  • Collenchymatous cells do not contain chloroplasts.

  • They provide mechanical strength to the growing parts of the plant.

Both apical meristems and intercalary meristems:-
I. Are primary meristems
II. Appear early in plant life
III. Contribute to the formation of the primary plant body
  • Only I and II are correct
  • Only I and III are correct
  • Only II and III are correct
  • I, II and III are correct

The most impotant function of the trichomes is:

  • They prevent water loss due to transpiration

  • They prevent herbivory

  • They are sensory structures that decipher the wind velocity and direction

  • They play an important part in pollination of plants

Identify the incorrectly matched pair:-

  • cork cambium - periderm

  • ground meristem - cortex and pith of a dicot stem

  • procambium - primary vascular tissue

  • protoderm - vascular tissue of a monocot stem

Which of the following has unevenly thick cell wall, has a primary wall (cellulose) and a secondary wall (hemicellulose or pectin), and is a  simple, living, primarily mechanical tissue of the plant body?

  • Parenchyma

  • Collenchyma

  • Sclerenchyma

  • Aerenchyma

Intercalary meristems are called primary meristems because:

I. They appear early in life of a plant.

II. They contribute to the formation of the primary plant body.

  • Only I is correct

  • Only II is correct

  • Both I and II are correct

  • Both I and II are incorrect.

What is the number of correct statements amongst the following regarding phloem tissue of plants?

I. Gymnosperms lack albimunous cells and
sieve cells.

II. The companion cells are specialized
parenchymatous cells.
III. Phloem parenchyma is absent in most of the
monocotyledons.
IV. Phloem fibers are generally absent in the
primary phloem.

  • 0

  • 2

  • 3

  • 4

In dicot roots, the initiation of the lateral roots and the vascular cambium during the secondary growth takes place in:

  • Pericycle

  • Endodermis

  • Conjuctive tissue

  • Epidermis

In dicot stem the vascular bundle is:-

  • Conjoint, open and with exarch protoxylem.
  • Conjoint, open and with endarch protoxylem.
  • Conjoint and closed.
  • Scattered, each surrounded by a sclerenchymatous bundle sheath.

Bulliform cells:

  • Are found in dorsiventral leaves and help in photosynthesis.

  • Are found in dorsiventral leaves and help in minimizing water loss.

  • Are found in isobilatetral leaves and help in minimizing water loss.

  • Are found in isobilatetral leaves and help in photosynthesis.

During secondary growth in the stem:-

cambium is generally more active on the inner side than the outer.

  • The amount of secondary xylem produced is more than the secondary phloem as the

  • the amount of secondary phloem produced is more than the secondary xylem as the cambium is generally more active on the inner side than the outer.

  • the amount of secondary xylem produced is more than the secondary phloem as the cambium is generally more active on the outer side than the inner.

  • the amount of secondary phloem produced is more than the secondary xylem as the cambium is generally more active on the outer side than the inner.

In temperate region plants, the wood with fewer xylary elements and narrow vessels, is termed as:-
  • Spring wood
  • Autumn wood
  • Sap wood
  • Heart wood

The term 'bark' includes : 

I.      Phellogen

II.     Phellem

III.    Phelloderm

IV.     Secondary phloem

 

  •        I, II and III only

  •        I, II and IV only

  •        II, III and IV only

  •        I, II, III and IV only

Identify the incorrect statement:

  •   The presence of vessels is a characteristic of angiosperms

  •   In roots the primary xylem is exarch

  •   Gymnosperms lack albuminous cells and sieve cells

  •   Bast fibers are generally absent in primary phloem

Parts of grasses removed by the grazing herbivores are regenerated due to the activity of: 

  • Apical meristem

  • Intercalary meristem

  • Interfascicular cambium

  • Fascicular vascular cambium

In the dicot root, the vascular cambium:-

  • is absent
  • is completely secondary in origin
  • does not form a continuous ring
  • originates from the tissue just above the phloem bundles

The pericycle, which gives rise to lateral roots, consists of:

  • Epithelial cells

  • Meristematic cells

  • Parenchymal cells

  • Endodermal cells

Summer wood is:

  • the same as heartwood.

  • found to the outside of each annular ring of xylem.

  • found to the inside of each annular ring of xylem.

  • formed throughout the growing season.

The given transverse section is of:

 

  • Monocot stem

  • Dicot stem

  • Monocot root

  • Dicot root

The vascular bundle shown in the diagram is most likely to be seen in:

 

  • Monocot root

  • Dicot root

  • Monocot stem

  • Dicot stem

The main function of the plant tissue shown below is:

 

  • Storage of nutrients

  • Providing buoyancy to submerged plants

  • Mechanical support to growing parts of a plant

  • Increase in the length of the plant

Identify the wrong statement in context of heartwood.

  • Organic compounds are deposited in it

  • it is highly durable

  • It conducts water and minerals efficiently

  • It comprises dead elements with highly lignified walls

Which of the following is made up of dead cells?

  • Xylem parenchyma

  • Collenchyma

  • Phellem

  • Phloem

The vascular cambium normal gives rise to.

  • phelloderm                                         

  • primary phloem

  • secondary xylem                                 

  • periderm

Cortex is the region found between

  • Epidermis and stele

  • Pericycle and endodermis

  • Endodermis and pith

  • Endodermis and vascular bundle

The balloon-shaped structures called tyloses

  • Original in the lumen of vessels

  • characterise the sapwood

  • are exetentions of xylem parenchyma cells into vessels

  • are linked to the ascent of sap through xylem vessels

Specialised epidermal cells surrounding the guard cells are called ?

  • subsidiary cells

  • bulliform cells

  • lenticels

  • complementary cells

Vascular bundles in monocotyledons are considered closed because

 

  • a bundle sheath surrounds each bundle

  • cambium is absent

  • there are no vessels with performations

  • xylem is surrounded all around by phloem

A major characteristic of the monocot root is the presence of

  • open vascuiar bundles

  • scattered vascular bundles

  • vasculature without cambium

  • cambium sandwiched between phloem and xylem along the radius

You are given a fairly old piece of dicot stem and a dicot root. Which of the following

anatomical structures will you use to distinguish between the two?

  • Secondary xylem

  • Secondary phloem

  • Protoxylem

  • Cortical cells

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Practice Botany Quiz Questions and Answers