The given figure shows the T.S of dicot root. Some parts are marked as A, B, C, D, E, & F. Choose the option which shows the correct labelling of marked part.
A Epiblema, B Root hair, C Cortex, D Endodermis, E Pith, F Pericycle
A Cortex, B Pith, C Epiblema, D Endodermis, E Root hair, F Pericycle
A Epiblema, B Endodermis, C Cortex, D Root hair, E Pith, F Pericycle
A Cortex, B Epiblema, C Pith, D Endodermis, E Root hair, F Pericycle
Correct Answer :
D. A Cortex, B Epiblema, C Pith, D Endodermis, E Root hair, F Pericycle
In the given figure of T.S of dicot root, the parts marked as A, B, C, D, E and F are respectively cortex, epiblema, pith, endodermis, root hairs and pericycle. Dicot root consists of a single layer of epiblema which bears unicellular root hairs. Endodermis is followed by one or more layers of pericycle. Inner to pericycle lies radially arranged vascular bundles. This arrangement keeps the xylem bundles in direct contact with the outer tissue of the roots which conduct water absorbed by root hairs to the inside. Xylem is exarch.
Related Questions
The given figure shows the secondary growth in a dicot stem. Their parts are marked as A, B, C, D, E & F. Choose the correct labelling of the parts marked as A to F.
A Phellem, B Phellogen, C Medullary rays, D Secondary xylem, E Secondary phloem, F Cambium ring
A Phellem, B Phellogen, C Medullary rays, D Secondary phloem, E Secondary xylem, F Cambium ring
A Phellogen, B Phellem, C Medullary rays, D Secondary xylem, E Secondary phloem, F Cambium ring
A Phellem, B Phellogen, C Cambium ring, D Secondary xylem, E Secondary phloem, F Medullary rays
Match column-I with column-II and select the correct option from the codes given below.
| Column-I | Column-II |
|---|---|
| A. Stele | I. Innermost layer of cortex |
| B. Endodermis | II. Suberin |
| C. Casparian strips | III. All the tissues exterior to vascular cambium |
| D. Bark | IV. All the tissues inner to endodermis |
A IV, B I, C II, D III
A III, B II, C I, D IV
A I, B II, C III, D IV
A IV, B II, C I, D III
Match the elements of xylem given in column I with their character given in the column II and choose the correct option.
| Column-I | Column-II |
|---|---|
| A. Xylem vessels | I. Store food materials |
| B. Xylem tracheids | II. Obliterated lumen |
| C. Xylem fibres | III. Perforated plates |
| D. Xylem parenchyma | IV. Chisel-like ends |
A IV; B III; C II; D I
A III; B II; C I; D IV
A II; B I; C IV; D III
A III; B IV; C II; D I
Phellogen and phellem respectively denote
cork and cork cambium,
cork cambium and cork,
secondary cortex and cork,
cork and secondary cortex,
A plant tissue when stained showed the presence of hemicellulose and pectin in cells wall of its cells. The tissue is called
collenchyma
sclerenchyma
xylem
meristem
When we peel the skin of a potato tuber, we remove
periderm
epidermis
cuticle
leaves
Sclerenchyma usually___________and_____________ protoplasts.
live, without
dead, with
live, with
dead, without
Trees at sea do not have annual rings because
soil is sandy.
there is climatic variation.
there is no marked climatic variation.
there is enough moisture in the atmosphere.
Tissue(s) present in an annual ring is/are
secondary xylem and phloem.
primary xylem and phloem.
secondary xylem only.
primary phloem and secondary xylem.
A narrow layer of thin walled cells found between phloem/ bark and wood of a dicot is
cork cambium
vascular cambium
endodermis
both (a) & (c)
Which one of the following statement is incorrect ?
- Epidermal cell has small amount of cytoplasm and a large vacuole.
- Waxy cuticle layer is absent in roots.
- Root hairs are unicellular, while stem hairs / trichomes are multicellular.
- Trichomes may be branched or unbranched, soft or stiff and prevent transpiration.
- Guard cells are dumbell shaped in dicots and beanshaped in monocots (e.g. grass).
Only (i)
Only (iv)
Only (iii)
Only (v)
Read the following statements and answer the question.
- It has a sclerenchymatous hypodermis, a large number of scattered vascular bundles and a large parenchymatous ground tissue.
- Vascular bundles are conjoint and closed.
- Peripheral vascular bundles are generally smaller than the centrally located ones.
- Phloem parenchyma is absent, and water- containing cavities are present within the vascular bundles.
Which plant anatomy is being described by the above statements?
Dicotyledonous root
Monocotyledonous root
Dicotyledonous stem
Monocotyledonous stem
Sieve tubes are suited for translocation of food because they possess
bordered pits.
no ends walls.
broader lumen and perforated cross walls.
no protoplasm.
Which of the following statement(s) is/are correct ?
- Uneven thickening of cell wall is characteristic of sclerenchyma.
- Periblem forms cortex of the stem and the root.
- Tracheids are the chief water transporting elements in gymnosperms.
- Companion cell is devoid of nucleus at maturity.
- The commercial cork is obtained from Quercus suber.
(i) and (iv) only
(ii) and (v) only
(iii) and (iv) only
(ii), (iii) and (v) only
The trees growing in desert will
show alternate rings of xylem and sclerenchyma.
have only conjunctive tissue and phloem is formed by the activity of cambium.
show distinct annual rings.
not show distinct annual rings.
Which type of plant tissue is being described by the given statements?
- It consists of long, narrow cells with thick and lignified cell walls having a few or numerous pits.
- They are dead and without protoplasts.
- On the basis of variation in form, structure, origin and development, it may be either fibres or sclereids.
- It provides mechanical support to organs.
Parenchyma
Sclerenchyma
Collenchyma
Chlorenchyma
As secondary growth proceeds, in a dicot stem, the thickness of
sapwood increases.
heartwood increase.
both sapwood and heartwood increases.
both sapwood and heartwood remains the same.
A tissue is a group of cells which are
similar in origin, but dissimilar in form and function.
dissimilar in origin, form and function.
dissimilar in origin, but similar in form and function.
similar in origin, form and function.
Match the names of the structures given in column-I with the functions given in column-II, choose the answer which gives the correct combination of the two columns :
| Column-I | Column-II |
|---|---|
| (Structure) | (Function) |
| A. Stomata | I. Protection of stem |
| B. Bark | II. Plant movement |
| C. Cambium | III. Secondary growth |
| D. Cuticle | IV. Transpiration |
| V. Prevent the loss of water | ... |
A V, B III, C I, D IV
A I, B IV, C V, D III
A II, B IV, C I, D III
A IV, B I, C III, D V
Match the terms given in column I with their funciton given in column II and choose the correct option.
| Column-I | Column-II |
|---|---|
| (Term) | (Functions) |
| 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
An organised and differentiated cellular structure having cytoplasm but no nucleus is called _________.
vessels
xylem parenchyma
sieve tubes
tracheids
Various functions like photosynthesis, storage, excretion performed by _____________.
sclerenchyma
parenchyma
collenchyma
aerenchyma
Some vascular bundles are described as open because these
are surrounded by pericycle but not endodermis.
are capable of producing secondary xylem and phloem.
possess conjunctive tissue between xylem and phloem.
are not surrounded by pericycle.
Match column-I with column-II and choose the correct option.
| Column -I | Column -II |
|---|---|
| A. Bulliform cells | I. Initiation of lateral roots |
| B. Pericycle | II. Root |
| C. Endarch xylem | III. Grasses |
| D. Exarch xylem | IV. Dicot leaf |
| E. Bundle sheath cells | V. Stem |
A III, B V, C IV, D I, E II
A II, B V, C I, D III, E IV
A II, B IV, C I, D III, E V
A III, B I, C V, D II, E IV
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 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
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
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
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
Which one of the following option shows the correct labelling of the parts marked as A, B, C and D in the given figure of a typical dicot root?
A Primary phloem, B Vascular cambium, C Secondary phloem, D Primary xylem
A Secondary phloem, B Vascular cambium, C Primary phloem, D Primary xylem
A Primary phloem, B Primary xylem, C Secondary phloem, D Vascular cambium
A Secondary phloem, B Primary xylem, C Primary phloem, D Vascular cambium
A common structural feature of vessel elements and sieve tube elements are
pores on lateral walls.
presence of p-protein.
enucleate condition.
thick secondary walls.
Which of the following pair of match is not correct?
Pith - Large and well developed in monocotyledonous root.
Root hairs - Helps in preventing water loss due to transpiration
Sieve tube elements - Its functions are controlled by the nucleus of companion cells.
Stomatal apparatus - Consists of stomatal aperture, guard cells and surrounding subsidiary cells
Identify A, B and C in the given figure of shoot apical meristem
A Leaf primordium, B Shoot apical meristem, C Axillary bud
A Leaf primordium, B Shoot apical meristem, C Apical bud
A Root hair primordium, B Root apical meristem, C Axillary bud
A Root hair primordium, B Root apical meristem, C Terminal bud
Which of the following statement(s) is/are not correct?
- Cork cambium is also called phellogen.
- Cork is also called phellem.
- Secondary cortex is also called periderm.
- Cork cambium, cork and secondary cortex are collectively called phelloderm.
(iii) and (iv)
(i) and (ii)
(ii) and (iii)
(ii) and (iv)