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T.S. of dicot stem is given below, certain parts have been marked by alphabets (A I). Choose the option which shows their correct labelling.

A. A Epidermis, B Epidermal hair, C Parenchyma, D Starch sheath, E Hypodermis (collenchyma), F Vascular bundle, G Bundle cap, H Medulla or pith, I Medullary rays

B. A Epidermal hair, B Epidermis, C Hypodermis (collenchyma), D Parenchyma, E Endoderm is (Starch Sheath), F Pericycle, G Vascular bundle, H Medullary rays, I Medulla or pith

C. A Epidermal hair, B Epidermis, C Hypodermis (collenchyma), D Starch sheath, E Parenchyma, F Vascular bundle, G Bundle cap, H Medulla or pith, I Medullary rays

D. A Epidermal hair, B Epidermis, C Parenchyma, D Hypodermis (collenchyma), E Starch sheath, F Vascular bundle, G Bundle cap, H Medulla or pith, I Medullary rays

Correct Answer :

B. A Epidermal hair, B Epidermis, C Hypodermis (collenchyma), D Parenchyma, E Endoderm is (Starch Sheath), F Pericycle, G Vascular bundle, H Medullary rays, I Medulla or pith


In the given figure of dicot stem, the parts marked as A, B,C, D, E, F, G, H and I are respectively epidermal hair, epidermis, hypodermis, parenchyma, endodermis, pericycle, vascular bundle, medullary rays and medulla or pith. Dicot stems with primary growth have pith in the centre, with vascular bundles forming a distinct ring visible when the stem is viewed in cross section. The outside of the stem is covered with an epidermis, which is covered by a waterproof cuticle. The epidermis also may contain stomata for gas exchange and multicellular stem hairs called trichomes. A cortex consisting of hypodermis (collenchyma cells) and endodermis (starch containing cells) is present above the pericycle and vascular bundles. Inner to endodermis is present a few layers of heterogenous pericycle. Vascular bundles are conjoint, collateral and open. Medullary rays are present in between vascular bundles. Cambium helps in secondary growth.

Related Questions

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4

In land plants, the guard cells differ from other epidermal cells in having

A. cytoskeleton.

B. mitochondria.

C. endoplasmic reticulum.

D. chloroplasts.

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4

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

A. sapwood increases.

B. heartwood increase.

C. both sapwood and heartwood increases.

D. both sapwood and heartwood remains the same.

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4

T.S. of dicot stem is given below, certain parts have been marked by alphabets (A I). Choose the option which shows their correct labelling.

A. A Epidermis, B Epidermal hair, C Parenchyma, D Starch sheath, E Hypodermis (collenchyma), F Vascular bundle, G Bundle cap, H Medulla or pith, I Medullary rays

B. A Epidermal hair, B Epidermis, C Hypodermis (collenchyma), D Parenchyma, E Endoderm is (Starch Sheath), F Pericycle, G Vascular bundle, H Medullary rays, I Medulla or pith

C. A Epidermal hair, B Epidermis, C Hypodermis (collenchyma), D Starch sheath, E Parenchyma, F Vascular bundle, G Bundle cap, H Medulla or pith, I Medullary rays

D. A Epidermal hair, B Epidermis, C Parenchyma, D Hypodermis (collenchyma), E Starch sheath, F Vascular bundle, G Bundle cap, H Medulla or pith, I Medullary rays

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4

The given figure shows T.S. of monocot stem. Identify the correct labelling of A to F marked in the given figure.

A. A Epidermis, B Hypodermis, C Vascular bundles, D Phloem, E Xylem, F Ground tissue

B. A Cuticle, B Epidermis, C Sclerenchymatous sheath, D Sclerenchymatous hypodermis, E Parenchymatous sheath, F Phloem

C. A Cuticle, B Epidermis, C Sclerenchymatous hypodermis, D Sclerenchymatous sheath, E Parenchymatous sheath, F Phloem

D. A Cuticle, B Epidermis, C Sclerenchymatous hypodermis, D Sclerenchymatous sheath, E Parenchymatous sheath, F Protoxylem

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4

The given diagrams show stomatal apparatus in dicots and monocots. Which one is correct option for A, B and C?

A. A Epidermal cells; B Subsidiary cells; C chloroplast

B. A Guard cells; B Subsidiary cells; C Stomatal pore

C. A Guard cells; B Epidermal cells; C Guard cells

D. A Epidermal cells; B Subsidiary cells; C Guard cells

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4

Some vascular bundles are described as open because these

A. are surrounded by pericycle but not endodermis.

B. are capable of producing secondary xylem and phloem.

C. possess conjunctive tissue between xylem and phloem.

D. are not surrounded by pericycle.

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4

Identify types of vascular bundles in given figures A, B and C.

A. Radial; Conjoint closed; Conjoint open

B. Conjoint closed; Conjoint open; Radial

C. Conjoint open; Conjoint closed; Radial

D. Bicollateral; Concentric; Radial

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4

Match column-I with column-II and choose the correct option.
Column -IColumn -II
A. Bulliform cellsI. Initiation of lateral roots
B. PericycleII. Root
C. Endarch xylemIII. Grasses
D. Exarch xylemIV. Dicot leaf
E. Bundle sheath cellsV. Stem

A. A III, B V, C IV, D I, E II

B. A II, B V, C I, D III, E IV

C. A II, B IV, C I, D III, E V

D. A III, B I, C V, D II, E IV

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4

The vessel elements of angiosperms differ from other elements of xylem in having

A. simple pits on their radial walls.

B. bordered pits on their lateral walls.

C. simple and bordered pits on their end walls.

D. simple perforation on their end walls.

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4

A tissue is a group of cells which are

A. similar in origin, but dissimilar in form and function.

B. dissimilar in origin, form and function.

C. dissimilar in origin, but similar in form and function.

D. similar in origin, form and function.

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4

In an experiment, a student cut a transverse section of young stem of a plant which he has taken from his school garden.
After observing it under the microscope how would he ascertain whether it is a monocot stem or a dicot stem?

A. With the help of bulliform cells.

B. With the help of casparian strips.

C. With the help of vascular bundles.

D. With the help of stomatal apparatus.

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4

The length of different internodes in a culm of sugarcane is variable because of

A. size of leaf lamina at the node below each internode

B. intercalary meristem

C. shoot apical meristem

D. position of axillary buds

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4

Match the elements of xylem given in column I with their character given in the column II and choose the correct option.
Column-IColumn-II
A. Xylem vesselsI. Store food materials
B. Xylem tracheidsII. Obliterated lumen
C. Xylem fibresIII. Perforated plates
D. Xylem parenchymaIV. Chisel-like ends

A. A IV; B III; C II; D I

B. A III; B II; C I; D IV

C. A II; B I; C IV; D III

D. A III; B IV; C II; D I

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A vascular bundle in which the protoxylem is pointing to the periphery is called __________.

A. endarch

B. exarch

C. radial

D. closed

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4

Which of the following statement(s) is/are not correct?
  1. Cork cambium is also called phellogen.
  2. Cork is also called phellem.
  3. Secondary cortex is also called periderm.
  4. Cork cambium, cork and secondary cortex are collectively called phelloderm.

A. (iii) and (iv)

B. (i) and (ii)

C. (ii) and (iii)

D. (ii) and (iv)

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4

During the formation of leaves and elongation of stem, some cells left behind from the shoot apical meristem, constitute the

A. lateral meristem

B. axillary bud

C. cork cambium

D. fascicular cambium

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4

T.S. of dicot leaf passing through the midrib is given below. Certain parts have been marked by alphabets (A to H). Choose the option showing their correct labelling.

A. A Epidermis, B Spongy mesophyll, C Palisade mesophyll, D Stomata, E Guard cells, F Phloem, G Metaxylem, H Protoxylem

B. A Epidermis, B Palisade mesophyll, C Spongy mesophyll, D Sub-stomatal cavity, E Stoma, F Phloem, G Xylem, H Bundle sheath

C. A Epidermis, B Palisade mesophyll, C Spongy mesophyll, D Stomata, E Guard cells, F Epidermis, G Xylem, H Phloem

D. A Epidermis, C Palisade mesophyll, C Spongy mesophyll, D Stomata, E Guard cells, F Phloem, G Metaxylem, H Protoxylem

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4

Cambium is considered as a lateral meristem because

A. it gives rise to lateral branches.

B. it causes increase in girth.

C. it increases height and diameter of a plant.

D. it adds bulk to a plant.

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4

Which of the following statements are correct ?
  1. Xylem transports water and minerals.
  2. Gymnosperms lack sieve tubes and companion cells in phloem.
  3. The first formed primary xylem is called metaxylem.
  4. Phloem fibres (bast fibres) are made up of collenchymatous cells.

A. (i) and (iii)

B. (i) and (ii)

C. (iii) and (iv)

D. (i) and (iv)

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4

Match the terms given in column I with their funciton given in column II and choose the correct option.
Column-IColumn-II
(Term)(Functions)
A. MeristemI. Photosynthesis, storage
B. ParenchymaII. Mechanical support
C. CollenchymaIII. Actively dividing cells
D. SclerenchymaIV. Stomata
E. Epidermal tissueV. Sclereids

A. A I, B III, C V, D II, E IV

B. A III, B I, C II, D V, E IV

C. A II, B IV, C V, D I, E III

D. A V, B IV, C III, D II, E I

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4

Gymnosperms are also called soft wood spermatophytes because they lack

A. cambium

B. phloem fibres

C. thick-walled tracheids

D. xylem fibres

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4

Which of the following pair of match is not correct?

A. Pith - Large and well developed in monocotyledonous root.

B. Root hairs - Helps in preventing water loss due to transpiration

C. Sieve tube elements - Its functions are controlled by the nucleus of companion cells.

D. Stomatal apparatus - Consists of stomatal aperture, guard cells and surrounding subsidiary cells

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4

Identify A, B and C in the given figure of shoot apical meristem

A. A Leaf primordium, B Shoot apical meristem, C Axillary bud

B. A Leaf primordium, B Shoot apical meristem, C Apical bud

C. A Root hair primordium, B Root apical meristem, C Axillary bud

D. A Root hair primordium, B Root apical meristem, C Terminal bud

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4

Why grafting is successful in dicots ?

A. In dicots vascular bundles are arranged in a ring.

B. Dicots have cambium for secondary growth.

C. In dicots vessels with elements are arranged end to end.

D. Cork cambium is present in dicots

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Which of the following figure is a type of permanent tissue having many different types of cell?

A.

B.

C.

D.

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Which of the following statements is correct?

A. Lenticels occur in most woody trees.

B. Sclerenchymatous cells are usually present in cortex.

C. The vascular tissue system is divided into three main zones- cortex, pericycle and pith.

D. The conjoint vascular bundles usually have the xylem located only on the outer side of the phloem.

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4

A plant tissue when stained showed the presence of hemicellulose and pectin in cells wall of its cells. The tissue is called

A. collenchyma

B. sclerenchyma

C. xylem

D. meristem

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4

Cork cambium and vascular cambium are

A. the parts of secondary xylem and phloem.

B. the parts of pericycle.

C. lateral meristems.

D. apical meristems.

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4

When we peel the skin of a potato tuber, we remove

A. periderm

B. epidermis

C. cuticle

D. leaves

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Which one of the following have vessels as their characteristic feature?

A. Angiosperms

B. Gymnosperms

C. Pteridophytes

D. Bryophytes