Which type of cells are not present in Phloem of monocot stem

  • Companion cell

  • sieve tubes

  • Phloem parenchyma

  • Phloem fibres

Which type of cavity is  present within the vascular bundles of monocot stem

  • air cavity

  • water cavity

  • Both A and B

  • Food cavity

Primary xylem is of two types, they are-

  • Protoxylem and metaxylem

  • Xylem parenchyma and xylem fibres

  • Tracheids and vessels

  • Simple xylem and complex xylem

In roots, the Protoxylem lies toward __________ and Metaxylem lies toward the _______ respectively.

  • Periphery, centre

  • Centre, periphery

  • Above, below

  • Below, above

Phloem in angiosperm is composed of
1. Sieve tube element
2. Companion cell
3. Phloem parenchyma
4. Phloem fibres
5. Tracheids
6. Vessels

  • . 1,2,3,4
  • . 2,3,4,5
  • . 3,4,5,6
  • . None

Phloem of gymnosperm consist of

  • Albuminous cells and Sieve cells

  • Sieve tubes and companion cells

  • Phloem parenchyma and phloem fibres

  • None of the above

Function of sieve tubes are controlled by

  • Nucleus of sieve tube

  • Nucleus of companion cell

  • Nucleus of parenchyma

  • No function as they are dead cells

The companion cells help in maintaining the ________ in the sieve tube.

  • Temperature gradient

  • Cellulose gradient

  • Pressure gradient

  • Ion gradient

Resin, latex and mucilage are found in

  • Phloem parenchyma

  • Xylem parenchyma

  • Phloem pits

  • None of the above

Phloem parenchyma is absent in most of the

  • Dicotyledons

  • Monocotyledons

  • Desert plants

  • None of the above

Phloem fibres are made up of

  • Parenchymatous cells

  • Sclerenchymatous cells

  • Collenchymatous cells

  • None of the above

Which component of Jute, Flax and Hemp are commonly used?

  • Phloem fibres

  • Xylem fibres

  • Sieve tubes

  • All of the above

Epidermis in plant is generally

  • Single layered

  • Double layered

  • Triple layered

  • Present in patches

Epidermal cells are parenchymatous with __________ amount of cytoplasm lining, the cell wall and _______ vacuole.

  • Small, large

  • Large, small

  • Small, no

  • Large, no

A waxy thick layer which prevent water loss is

  • Cuticle

  • Guard cell

  • Epidermis

  • Stomata

Cuticle is not found in

  • Stem

  • Branches

  • Leaves

  • Roots

Opening and closing of stomata is a function of

  • Cuticle

  • Guard cell

  • Waxy layer

  • Xylem

Transpirational rate is controlled by

  • Xylem

  • Phloem

  • Guard cell

  • Leaves

The stomatal aperture, guard cell and the surrounding subsidiary cells are together called________.

  • Stomata

  • Stomatal apparatus

  • Stomatal aperture

  • Cuticle

In plant stem the epidermal hairs are called

  • Cilia

  • Trichomes

  • Trichoderms

  • Trichromes

Trichomes help in

  • Preventing water loss

  • Have sensory role

  • Help in combating grazing animals

  • None of the above

All tissue except ____________ constitute the ground tissue.

(1) Epidermis

  • (3) Both and (2)

  • Vascular bundles

  • 3

  • Cuticle

In leaves the ground tissue consist of thin walled chloroplast containing cells and is called____.

  • Mesophyll

  • Chlorophyll

  • P250

  • Chromophore

The vascular system in plant consist of

  • Xylem and phloem

  • Xylem parenchyma and cortex

  • Epidermis and cortex

  • None of the above

In dicotyledonous stem _________ is present between phloem and xylem.

  • Cork

  • Cambium

  • Connecting vessel

  • Connecting tubes

The presence of cambium possess the ability to form secondary xylem and phloem tissue and hence are called

  • Open vascular bundle

  • Closed vascular bundle

  • Intermediate vascular bundle

  • End node vascular bundle

In monocotyledons the vascular bundle have no ________ present in them.

  • Xylem

  • Cambium

  • Cork

  • Phloem

Since there is no cambium present in monocotyledons they are referred to as

  • Open vascular bundle

  • Closed vascular bundle

  • Intermediate vascular bundle

  • End node vascular bundle

When xylem and phloem within a vascular bundle are arranged in an alternate manner on different radii such arrangement is called _______ and found mostly in __________.

  • Radial, roots

  • Radial, shoots

  • Conjoint, roots

  • Conjoint, shoots

When xylem and phloem are situated at the same radius of vascular bundle, then they are called _________ type of vascular bundle and are found in _________.

  • Radial, roots

  • Radial, stem and leaves

  • Conjoint, root

  • Conjoint, stems and leaves

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