When we peel the skin of a potato tuber, we remove
periderm
epidermis
cuticle
leaves
Correct Answer :
A. periderm
Potato is a stem tuber. When we peel the skin of a potato tuber, we remove periderm. Periderm is the corky outer layer of a plant stem formed in secondary thickening or as a response to injury or infection.
Related Questions
In the given figure of phloem tissue, identify the marked part (A, B and C) which help in maintaining the pressure gradient
in the sieve tubes.
A
B
C
None of the above
Gymnosperms are also called soft wood spermatophytes because they lack
cambium
phloem fibres
thick-walled tracheids
xylem fibres
Xylem functions as a conducting tissue for water and minerals from _________to the ______and__________.
roots, stems, leaves
stems, roots, leaves
leaves, stems, roots
leaves, stems, leaves
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.
In the given columns, column I contain structures of female reproductive system and column II contain its feature. Select the correct match.
| Column-I | Column-II |
|---|---|
| A. Lateral meristem | (i) Fascicular vascular cambium, interfascicular cambium and cork cambium. |
| B. Apical meristem | (ii) Produces dermal tissue, ground tissues and vascular tissue. |
| C. Bast fibres | (iii) Generally absent in primary phloem but found in secondary phloem. |
| D. Sap wood | (iv) Involved in the conduction of water and minerals from the root to leaf. |
A - (i), B - (ii), C - (iii), D - (iv)
A - (iii), B - (i), C - (ii), D - (iv)
A - (i), B - (iv), C - (iii), D - (ii)
A - (ii), B - (iv), C - (iii), D - (i)
The given figure shows apical meristem of root apex with few part marked as A, B and C. Identify the correct labelling of A, B and C.
A Vascular structure, B Protoderm, C Root cap
A Cortex, B Endodermis, C Root cap
A Cortex, B Protoderm, C Root cap
A Tunica, B Protoderm, C Root cap
A vascular bundle in which the protoxylem is pointing to the periphery is called __________.
endarch
exarch
radial
closed
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
Tissues are classified into two main groups, namely meristematic and permanent tissues on the basis of
whether the cells being able to divide or not.
position of the cells.
whether they are living or dead.
none of the above
Which of the following statements are correct ?
- Xylem transports water and minerals.
- Gymnosperms lack sieve tubes and companion cells in phloem.
- The first formed primary xylem is called metaxylem.
- Phloem fibres (bast fibres) are made up of collenchymatous cells.
(i) and (iii)
(i) and (ii)
(iii) and (iv)
(i) and (iv)
Choose the correct labelling of (A J) in the given figure of T.S. of monocot root.
A Root hair, B Epiblema, C Cortex, D Endodermis, E Passage cell, F Pericycle, G Pith, H Phloem, I Metaxylem.
A Root hair, B Epiblema, C Cortex, D Endodermis, E Passage cell, F Pith, G Pericycle, H Metaxylem, I Phloem.
A Root hair, B Epiblema, C Cortex, D Endodermis, E Pericycle, F Phloem, G Protoxylem, I Metaxylem
A Root hair, B Cortex, C Epiblema, D Pericycle, E Endodermis, F Pith, G Phloem, H Protoxylem, I Metaxylem
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
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
The given figures are types of elements (A and B) which constitute one type of complex tissue (c) of a plant . Identify A, B and C.
A Tracheid, B Vessel, C Xylem
A Vessel, B Tracheild, C Phloem
A Fibre, B Tracheid, C Bark
A Fibre, B Sclereid, C Casparian strips
Which one of the followings option shows the correct labelling of the parts marked as A, B, C and D in the given figure a lenticel?
A Epidermis, B Secondary cortex, C Cork cambium, D Cork
A Pore, B Cork cambium, C Secondary cortex, D Cork
A Pore, B Cork, C Complimentary cells, D Cork cambium
A Epidermis, B Complimentary cells, C Cork cambium, D Secondary cortex
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.
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
T.S. of monocot leaf is given below, certain parts have been marked by alphabets (A G). Which one is the option showing there correct labelling?
A Adaxial epidermis, B Xylem, C Mesophyll, D Sub-stomatal cavity, E Abaxial epidermis, F Stoma, G Phloem
A Adaxial epidermis, B Abaxial epidermis, C Xylem, D Sub-stomatal cavity, E Stoma, F Mesophyll, G Phloem
A Adaxial epidermis, B Phloem, C Mesophyll, D Sub-stomatal cavity, E Abaxial epidermis, F Xylem, G Stoma
A Adaxial epidermis, B Xylem, C Stoma, D Substomatal cavity, E Abaxial epidermis, F Phloem, G Mesophyll
The given figure shows T.S. of monocot stem. Identify the correct labelling of A to F marked in the given figure.
A Epidermis, B Hypodermis, C Vascular bundles, D Phloem, E Xylem, F Ground tissue
A Cuticle, B Epidermis, C Sclerenchymatous sheath, D Sclerenchymatous hypodermis, E Parenchymatous sheath, F Phloem
A Cuticle, B Epidermis, C Sclerenchymatous hypodermis, D Sclerenchymatous sheath, E Parenchymatous sheath, F Phloem
A Cuticle, B Epidermis, C Sclerenchymatous hypodermis, D Sclerenchymatous sheath, E Parenchymatous sheath, F Protoxylem
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
Sieve tubes are suited for translocation of food because they possess
bordered pits.
no ends walls.
broader lumen and perforated cross walls.
no protoplasm.
Apical, intercalary and lateral meristems are differentiated on the basis of
origin
function
position
development
In stems, the protoxylem lies towards the _____________ and the metaxylem lies towards the ____________ of the organ.
centre; periphery
periphery; centre
periphery; periphery
centre; centre
Phellogen and phellem respectively denote
cork and cork cambium,
cork cambium and cork,
secondary cortex and cork,
cork and secondary cortex,
Why grafting is successful in dicots ?
In dicots vascular bundles are arranged in a ring.
Dicots have cambium for secondary growth.
In dicots vessels with elements are arranged end to end.
Cork cambium is present in dicots
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.
Cork cambium and vascular cambium are
the parts of secondary xylem and phloem.
the parts of pericycle.
lateral meristems.
apical meristems.
The __________ occurs in layers below the epidermis in dicotyledonous plants.
parenchyma
sclerenchyma
collenchyma
aerenchyma
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
Bast fibres are made up of _____________cells.
sclerenchymatous
chlorenchymatous
parenchymatous
aerenchymatous