NEET Topic-wise & A
Topic 1: THE TISSUES
NEET: Previous Years Questions
01: Given below are two statements: (NEET 2024)
Statement I: Parenchyma is living but collenchyma is dead tissue.
Statement II: Gymnosperms lack xylem vessels but presence of xylem vessels is the characteristic of angiosperms.
In the light of the above statements, choose the correct answer from the options given below:
(1) Both Statement I and Statement II are true
(2) Both Statement I and Statement II are false
(3) Statement I is true but Statement II is false
(4) Statement I is false but Statement II is true
✅ (4) Statement I is false but Statement II is true
02: Given below are two statements: (NEET 2023)
Statement I: Endarch and exarch are the terms often used for describing the position of secondary xylem in the plant body.
Statement II: Exarch condition is the most common feature of the root system.
In the light of the above statements, choose the correct answer from the options given below:
(1) Both Statement I and Statement II are false
(2) Statement I is correct but Statement II is false
(3) Statement I is incorrect but Statement II is true
(4) Both Statement I and Statement II are true
✅ (3) Statement I is incorrect but Statement II is true
03: Match List - I with List - II. (NEET 2021)
Select the correct answer from the options given below.
(a) (b) (c) (d)
(1) (ii) (iv) (i) (iii)
(2) (iv) (iii) (ii) (i)
(3) (i) (ii) (iii) (iv)
(4) (iii) (ii) (iv) (i)
✅ (1) (ii) (iv) (i) (iii)
04: Phloem in gymnosperms lacks: (NEET 2019)
(1) Albuminous cells and sieve cells
(2) Sieve tubes only
(3) Companion cells only
(4) Both sieve tubes and companion cells
✅ (4) Both sieve tubes and companion cells
Model Questions
05: A tissue is a group of cells having
(1) Common origin and function
(2) Common structure and function
(3) Common origin and structure
(4) All the above
✅ (4) All the above
06: Plant tissues are classified into Meristematic and Permanent tissues based on the
(1) Position of tissues
(2) Capability of cell division
(3) Shape of the cells
(4) Number of types of cells
✅ (2) Capability of cell division
07: The tissues where active cell division and growth occurs are called
(1) Meristems
(2) Intercalary meristems
(3) Apical meristems
(4) Lateral meristems
✅ (1) Meristems
08: Some cells ‘left behind’ from shoot apical meristem, constitute the
(1) Dermal tissues
(2) Secondary meristem
(3) Axillary bud
(4) Leaf primordium
✅ (3) Axillary bud
09: Label the figure correctly.
(1) A= Shoot apical meristem, B= Leaf primordium, C= Axillary bud, D= Differentiating vascular tissue
(2) A= Leaf primordium, B= Shoot apical meristem, C= Axillary bud, D= Differentiating vascular tissue
(3) A= Axillary bud, B= Leaf primordium, C= Shoot apical meristem, D= Differentiating vascular tissue
(4) A= Axillary bud, B= Shoot apical meristem, C= Leaf primordium, D= Differentiating vascular tissue
✅ (2) A= Leaf primordium, B= Shoot apical meristem, C= Axillary bud, D= Differentiating vascular tissue
10: Primary meristems are
(1) Apical and intercalary meristems
(2) Apical and lateral meristems
(3) Lateral and intercalary meristems
(4) Apical, intercalary and lateral meristems
✅ (1) Apical and intercalary meristems
11: Which meristem is occurred in regenerate parts removed by the grazing herbivores?
(1) Apical meristem
(2) Intercalary meristem
(3) Lateral meristem
(4) Secondary meristem
✅ (2) Intercalary meristem
12: Intra fascicular cambium is an example of
(1) Promeristem
(2) Primary meristem
(3) Plate meristem
(4) Secondary meristem
✅ (2) Primary meristem
13: Which of the following is the function of primary meristems?
(1) They contribute to the formation of primary plant body.
(2) Specific regions of the apical meristem produce dermal tissues and ground tissues.
(3) They produce vascular tissues.
(4) All of these
✅ (4) All of these
14: Fascicular vascular cambium, interfascicular cambium & cork cambium belong to
(1) Primary meristem
(2) Intercalary meristem
(3) Secondary meristem
(4) Apical meristem
✅ (3) Secondary meristem
15: Which one is false statement regarding lateral meristem?
(1) They occur in mature regions of roots & shoots.
(2) They are cylindrical meristems.
(3) They are seen in ferns, gymnosperms and all angiosperms.
(4) These are responsible for producing the secondary tissues.
✅ (3) They are seen in ferns, gymnosperms and all angiosperms.
16: The cells of permanent tissues are
(1) Differentiated from meristematic cells
(2) Having no ability to divide
(3) Structurally and functionally specialized
(4) All the above
✅ (4) All the above
17: Within a plant organ, the major tissue is
(1) Parenchyma
(2) Collenchyma
(3) Sclerenchyma
(4) Xylem
✅ (1) Parenchyma
18: Select the false statement.
(1) Simple permanent tissues include Parenchyma, Collenchyma and Sclerenchyma.
(2) In collenchyma, intercellular spaces are present.
(3) Cells of parenchyma are generally isodiametric.
(4) Sclerenchyma cells are usually dead without protoplasts.
✅ (2) In collenchyma, intercellular spaces are present.
19: Which of the following is not the function of parenchyma?
(1) Photosynthesis
(2) Buoyancy
(3) Food storage
(4) None of these
✅ (4) None of these
20: Identify the following figure and label A, B, C and D.
(1) Collenchyma. A= Thickened corners, B= Protoplasm, C= Vacuole, D= Cell wall
(2) Parenchyma. A= Thickened corners, B= Protoplasm, C= Vacuole, D= Cell wall
(3) Collenchyma. A= Thickened corners, B= Vacuole, C= Protoplasm, D= Cell wall
(4) Sclerenchyma. A= Thickened corners, B= Protoplasm, C= Vacuole, D= Cell wall
✅ (1) Collenchyma. A= Thickened corners, B= Protoplasm, C= Vacuole, D= Cell wall
21: Collenchyma consists of cells with much thickened corners due to deposition of
(1) Cellulose, hemicellulose and chitin
(2) Cellulose, lignin and pectin
(3) Cellulose, hemicellulose and pectin
(4) Cellulose, lignin and chitin
✅ (3) Cellulose, hemicellulose and pectin
22: Regarding collenchyma, which statement is false?
(1) It occurs in layers below the epidermis in dicot plants.
(2) It is found as a homogeneous layer or in patches.
(3) Intercellular spaces are absent.
(4) Cells are oval, spherical or polygonal and do not contain chloroplasts.
✅ (4) Cells are oval, spherical or polygonal and do not contain chloroplasts.
23: The tissue that provides mechanical support to the growing parts such as young stem and petiole of a leaf is
(1) Collenchyma
(2) Parenchyma
(3) Prosenchyma
(4) Sclerenchyma
✅ (1) Collenchyma
24: Analyze the below statements regarding sclerenchyma.
I. It consists of long, narrow cells with thick and lignified cell walls having a few or numerous pits.
II. The cells are usually dead without protoplasts.
III. The fibres are thin walled, elongated and pointed.
Of these,
(1) A & C are correct
(2) B & C are correct
(3) A & B are correct
(4) All are correct
✅ (3) A & B are correct
25: Odd one out.
(1) Sieve tubes
(2) Companion cells
(3) Tracheids
(4) Bast fibre
✅ (3) Tracheids
26: Two types of sclerenchyma are
(1) Tracheids and Sclereids
(2) Sclereids and fibres
(3) Vessels and fibres
(4) Vessels and Tracheids
✅ (2) Sclereids and fibres
27: Major function of sclerenchyma is
(1) Mechanical support to organs
(2) Role in photosynthesis
(3) Secretion resins and gums
(4) Protection of leaves
✅ (1) Mechanical support to organs
28: Select the true statements from the following.
I. Parenchyma cells are living whereas sclerenchyma cells are dead.
II. Sclerenchyma cells retain their power of division whereas Parenchyma cells cannot divide.
III. Parenchyma cell walls are thin whereas the cell walls of sclerenchyma cells are highly lignified and hence thick.
IV. Sclerenchyma cells contain cytoplasm whereas the Parenchyma cells are empty.
(1) A & C
(2) B & D
(3) Only A
(4) A, B & C
✅ (1) A & C
29: The tissues made up of more than one type of cells and they work together as a unit are called
(1) Lateral meristems
(2) Permanent tissues
(3) Simple permanent tissues
(4) Complex permanent tissues
✅ (4) Complex permanent tissues
30: Xylem is a conducting tissue which has 4 components such as
(1) Tracheids, vessels, xylem fibres and xylem parenchyma
(2) Tracheids, sclerieds, xylem fibres and xylem parenchyma
(3) Sclerieds, companion cells, xylem fibres and xylem parenchyma
(4) Sclerieds, vessels, xylem fibres and companion cells
✅ (1) Tracheids, vessels, xylem fibres and xylem parenchyma
31: Identify the figure given below and label A & B.
(1) Sclerenchyma. A= Fibre, B= Sclerieds
(2) Phloem. A= Fibre, B= Sieve tube elements
(3) Xylem. A= Tracheid, B= Vessels
(4) Sclerenchyma. A= Sclerieds, B= Fibre
✅ (3) Xylem. A= Tracheid, B= Vessels
32: Both xylem and phloem consist of
(1) Tracheids and fibres
(2) Parenchyma and fibres
(3) Sieve tube & fibres
(4) Tracheids and parenchyma
✅ (2) Parenchyma and fibres
33: Which of the following is not the similarity between xylem and phloem?
(1) Both have a tubular shape
(2) Both are present in the roots, stems and leaves of the plant
(3) Both perform bidirectional flow of materials
(4) Both contain living cells and dead cells
✅ (3) Both perform bidirectional flow of materials
34: Analyze the following statements.
I. In xylem, of four types of cells, one is living and three are dead.
II. In phloem, of four types of cells, one is living and three are dead.
III. In xylem, of four types of cells, three are is living and one is dead.
IV. In phloem, of four types of cells, three is living and one is dead.
Of these,
(1) A & B are correct
(2) A & B are wrong
(3) A & D are correct
(4) A & D are wrong
✅ (3) A & D are correct
35: The xylem vessels are a characteristic feature of
(1) Bryophytes
(2) Pteridophytes
(3) Gymnosperms
(4) Angiosperms
✅ (4) Angiosperms
36: Which of the following statement correctly defines Endarch condition?
(1) It is a type of primary xylem seen in stem in which the protoxylem lies towards the centre (pith) and the metaxylem lies towards the periphery of the organ.
(2) It is a type of primary xylem seen in stem in which the protoxylem lies towards the periphery of the organ and the metaxylem lies towards the centre (pith).
(3) It is a type of primary xylem seen in root in which the protoxylem lies towards the centre (pith) and the metaxylem lies towards the periphery of the organ.
(4) It is a type of primary xylem seen in root in which the protoxylem lies towards the periphery of the organ and the metaxylem lies towards the centre (pith).
✅ (1) It is a type of primary xylem seen in stem in which the protoxylem lies towards the centre (pith) and the metaxylem lies towards the periphery of the organ.
37: The components of phloem in gymnosperms are
(1) Sieve tube, companion cells, parenchyma and fibres
(2) Sieve tube, companion cells, albuminous cells and fibres
(3) Sieve cells, companion cells, albuminous cells and parenchyma
(4) Sieve cells, albuminous cells, parenchyma and fibres
✅ (4) Sieve cells, albuminous cells, parenchyma and fibres
38: Given below is the diagrammatic representation of phloem. Label the parts A, B, C and D.
(1) A= sieve tube element, B= sieve pore, C= phloem parenchyma, D= companion cell
(2) A= sieve pore, B= sieve tube element, C= phloem parenchyma, D= companion cell
(3) A= companion cell, B= sieve tube element, C= phloem parenchyma, D= sieve pore
(4) A= sieve tube element, B= phloem parenchyma, C= sieve pore, D= companion cell
✅ (2) A= sieve pore, B= sieve tube element, C= phloem parenchyma, D= companion cell
39: Companion cells are
(1) Specialized collenchymatous cells closely associated with sieve tube elements
(2) Specialized parenchymatous cells closely associated with bast fibres
(3) Specialized parenchymatous cells closely associated with sieve tube elements
(4) Specialized sclerenchymatous cells closely associated with bast fibres
✅ (3) Specialized parenchymatous cells closely associated with sieve tube elements.
40: The function of phloem parenchyma is
(1) Storing of food material and other substances like resins, latex and mucilage.
(2) Conduction of food materials from leaves.
(3) Maintenance of the pressure gradient in sieve tubes.
(4) Mechanical support & protection to soft tissues.
✅ (1) Storing of food material and other substances like resins, latex and mucilage.
41: Of the given statements regarding phloem fibres, one is wrong. Pick it out.
(1) They are made up of sclerenchymatous cells.
(2) They are generally present in primary phloem but are absent in the secondary phloem.
(3) They have quite thick cell wall.
(4) At maturity, they lose protoplasm and become dead.
✅ (2) They are generally present in primary phloem but are absent in the secondary phloem.
Topic 2: THE TISSUE SYSTEM
NEET: Previous Years Questions
42: In the given figure, which component has thin outer walls and highly thickened inner walls? (NEET 2024)
(1) C
(2) D
(3) A
(4) B
✅ (1) C
43: Specialised epidermal cells surrounding the guard cells are called
(1) bulliform cells
(2) lenticels
(3) complementary cells
(4) subsidiary cells (NEET-I 2016)
✅ (4) subsidiary cells
Model Questions
44: Cuticle is absent in
(1) Stem
(2) Root
(3) Leaf
(4) Both 2 and 3
✅ (2) Root
45: Regarding trichomes, which statement is incorrect?
(1) They are the epidermal hairs on stem.
(2) They may be secretory.
(3) They are always unicellular, unbranched & soft.
(4) They help to prevent water loss due to transpiration.
✅ (3) They are always unicellular, unbranched & soft.
46: Ground tissue includes
(1) All tissues except epidermis & vascular bundles
(2) Epidermis and cortex
(3) All tissues internal to endodermis
(4) All tissues external to endodermis
✅ (1) All tissues except epidermis & vascular bundles
47: Lateral roots develop from primordia originated by the division of
(1) Pericycle cells lying opposite to protoxylem points
(2) Pericycle cells lying between two protoxylem points
(3) Endodermal cells lying between two protoxylem points
(4) Endodermal cells lying opposite to protoxylem points
✅ (2) Pericycle cells lying between two protoxylem points
48: Jute is mainly composed of
(1) Xylem
(2) Secondary bast fibre
(3) Phloem
(4) Cortex
✅ (2) Secondary bast fibre
49: The beneficial use of epidermal layer is
(1) Bast fibre
(2) Mesocarp
(3) Cotton fibre
(4) Jute
✅ (3) Cotton fibre
50: Vascular bundle having phloem at the centre encircled by xylem is known as
(1) Bicollateral
(2) Conjoint Collateral
(3) Amphivasal
(4) Amphicribral
✅ (3) Amphivasal
51: Bicollateral conjoint vascular bundles have
(1) Xylem & phloem, which are arranged in an alternate manner on different radii
(2) Xylem & phloem, which are situated at the same radius and it has two groups of phloem along the two sides of xylem
(3) Xylem & phloem in same radius but it has only one group phloem outside the xylem
(4) Phloem surrounds the xylem tissues
✅ (2) Xylem & phloem, which are situated at the same radius and it has two groups of phloem along the two sides of xylem
52: Amphivasal vascular bundle possess
(1) Xylem around phloem
(2) Phloem around xylem
(3) Phloem on both sides of xylem
(4) Phloem towards centre and xylem towards periphery
✅ (1) Xylem around phloem
53: Which of the following is not a characteristic feature of bryophytes?
(1) Dominant gametophytic generation
(2) Filamentous rhizoids
(3) Amphibious habitat
(4) Vascular tissues
✅ (4) Vascular tissues
54: A bicollateral vascular bundle has the following arrangement of tissues.
(1) Outer phloem → Outer xylem → Middle cambium → Inner xylem → Inner phloem
(2) Outer cambium → Outer phloem → Middle xylem → Inner phloem → Inner cambium
(3) Outer phloem → Outer cambium → Middle xylem → Inner cambium → Inner phloem
(4) Outer xylem → Outer cambium → Middle phloem → Inner cambium → Inner xylem
✅ (3) Outer phloem → Outer cambium → Middle xylem → Inner cambium → Inner phloem
55: In a vascular bundle, if xylem vessels develop in a centripetal fashion, the xylem is likely to be
(1) Mesarch
(2) Centrarch
(3) Endarch
(4) Exarch
✅ (4) Exarch
56: Meristematic tissue in vascular bundle is
(1) Phellem
(2) Procambium
(3) Interfascicular cambium
(4) Fascicular cambium
✅ (4) Fascicular cambium
57: Vascular bundle, in which two patches of phloem are present on both sides of xylem is
(1) Collateral
(2) Bicollateral
(3) Concentric
(4) Radial
✅ (2) Bicollateral
58: Given below is the representation of 2 types of vascular bundles. Select the option which is correctly labelled.
(1) A= Conjoint open, B= Conjoint closed, C= Phloem, D= Xylem
(2) A= Conjoint open, B= Conjoint closed, C= Xylem, D= Phloem
(3) A= Conjoint closed, B= Conjoint open, C= Phloem, D= Xylem
(4) A= Conjoint closed, B= Conjoint open, C= Xylem, D= Phloem
✅ (3) A= Conjoint closed, B= Conjoint open, C= Phloem, D= Xylem
Topic 3: ANATOMY OF DICOT & MONOCOT PLANTS
NEET: Previous Years Questions
59: Bulliform cells are responsible for (NEET 2024)
(1) Inward curling of leaves in monocots.
(2) Protecting the plant from salt stress.
(3) Increased photosynthesis in monocots.
(4) Providing large spaces for storage of sugars.
✅ (1) Inward curling of leaves in monocots.
60: Select the correct pair. (NEET 2021)
✅ (1) Cells of medullary rays that form part of cambial ring ̅ Interfascicular cambium
61: The transverse section of a plant shows following anatomical features:
a. Large number of scattered vascular bundles surrounded by bundle sheath.
b. Large conspicuous parenchymatous ground tissue.
c. Vascular bundles conjoint and closed.
d. Phloem parenchyma absent.
Identify the category of plant and its part:
(1) Dicotyledonous stem
(2) Dicotyledonous root
(3) Monocotyledonous stem
(4) Monocotyledonous root (NEET 2020)
✅ (3) Monocotyledonous stem
62: Grass leaves curl inwards during very dry weather. Select the most appropriate reason from the following: (NEET 2019)
(1) Closure of stomata
(2) Flaccidity of bulliform cells
(3) Shrinkage of air spaces in spongy mesophyll
(4) Tyloses in vessels
✅ (2) Flaccidity of bulliform cells
63: Stomata in grass leaf are (NEET 2018)
(1) Dumb-bell shaped
(2) Kidney shaped
(3) Rectangular
(4) Barrel shaped
✅ (1) Dumb-bell shaped
64: Casparian strips occurs in (NEET 2018)
(1) Epidermis
(2) Pericycle
(3) Cortex
(4) Endodermis
✅ (4) Endodermis
65: Root hair develop from the region of
(1) elongation
(2) root cap
(3) meristematic activity
(4) maturation (NEET 2017)
✅ (4) maturation
66: Cortex is the region found between
(1) epidermis and stele
(2) pericycle and endodermis
(3) endodermis and pith
(4) endodermis and vascular bundle. (NEET-II 2016)
✅ (1) epidermis and stele
Model Questions
67: Casparian strip is mainly found in
(1) Epidermis of roots
(2) Endodermis of stem
(3) Endodermis of roots
(4) Epidermis of stem
✅ (3) Endodermis of roots
68: All tissues on the inner side of the endodermis together constitute
(1) Stele
(2) Pith
(3) Pericycle
(4) Conjunctive tissue
✅ (1) Stele
69: Vascular bundles in monocotyledons are considered closed because
(1) Xylem is surrounded all around by phloem
(2) There are no vessels with perforations
(3) A bundle sheath surrounds each bundle
(4) There is no secondary growth
✅ (4) There is no secondary growth
70: The stele is composed of
(1) Vascular bundle
(2) Pith and vascular bundle
(3) Cortex and endodermis
(4) Pith and cortex
✅ (2) Pith and vascular bundle
71: Given below is the figure showing the anatomy of monocot root. Label A to F correctly.
(1) A= endodermis, B= pericycle, C= protoxylem, D= protoxylem, E= phloem, F= metaxylem
(2) A= pericycle, B= endodermis, C= phloem, D= metaxylem, E= pith, F= protoxylem
(3) A= endodermis, B= pericycle, C= phloem, D= protoxylem, E= pith, F= metaxylem
(4) A= pericycle, B= endodermis, C= phloem, D= protoxylem, E= pith, F= metaxylem
✅ (3) A= endodermis, B= pericycle, C= phloem, D= protoxylem, E= pith, F= metaxylem
72: Consider the following statements.
I. In a dicot root, the vascular bundles are collateral and endarch.
II. The innermost layer of cortex in a dicot root is endodermis.
III. In a dicot root, the phloem masses are separated from the xylem by parenchymatous cells.
(1) I is true, II & III are false
(2) II is true, I & III are false
(3) I is false, II & III are true
(4) II is false, I & III are false
✅ (3) I is false, II & III are true
73: Maximum number of vascular bundles are present in
(1) Monocot stem
(2) Monocot root
(3) Dicot stem
(4) Dicot root
✅ (2) Monocot root
74: The ring arrangement of vascular bundle is the characteristic feature of
(1) Monocot stem
(2) Dicot stem
(3) Monocot root
(4) Dicot root
✅ (2) Dicot stem
75: In dicot stem, the cortex has multiple layers of cells arranged in between
(1) Hypodermis and endodermis
(2) Epidermis and cortical layers
(3) Epidermis and pericycle
(4) Hypodermis and pericycle
✅ (3) Epidermis and pericycle
76: In dicot stem, which layer is known as starch sheath?
(1) Epidermis
(2) Hypodermis
(3) Cortical layers
(4) Endodermis
✅ (4) Endodermis
77: Which type of vascular bundles are found in monocot Stem?
(1) Collateral, open and endarch
(2) Radial, open and diarch
(3) Radial, open and mesarch
(4) Collateral, closed and endarch
✅ (4) Collateral, closed and endarch
78: Regarding monocot stem, choose the wrong statement.
(1) It has a sclerenchymatous hypodermis
(2) It has many scattered vascular bundles
(3) It has phloem parenchyma
(4) It has water-containing cavities within the vascular bundles
✅ (3) It has phloem parenchyma
79: Palisade parenchyma and spongy parenchyma are the components of
(1) Mesophyll
(2) Epidermis
(3) Pericycle
(4) Vascular bundles
✅ (1) Mesophyll
80: In dicotyledonous (dorsiventral) leaf, bundle sheath cells are seen surrounding the
(1) Epidermis
(2) Vascular bundles
(3) Mesophyll
(4) Stomata
✅ (2) Vascular bundles
81: In monocotyledonous (isobilateral) leaf, stomata are present on
(1) Lower surface of epidermis
(2) Upper surface of epidermis
(3) Both surfaces of the epidermis
(4) Mesophyll region
✅ (3) Both surfaces of the epidermis
82: In stomata, a few epidermal cells, near the guard cells become specialized in their shape and size. They are known as
(1) Mesophyll
(2) Subsidiary cells
(3) Bulliform cells
(4) Companion cells
✅ (2) Subsidiary cells
83: In grasses, certain adaxial epidermal cells along the veins modify themselves into large, empty, colourless cells. These are called
(1) Bulliform cells
(2) Guard cells
(3) Mesophyll cells
(4) Complementary cells
✅ (1) Bulliform cells
Topic 4: SECONDARY GROWTH
NEET: Previous Years Questions
84: Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R:
Assertion A: Late wood has fewer xylary elements with narrow vessels.
Reason R: Cambium is less active in winters.
In the light of the above statements, choose the correct answer from the options given below:
(1) Both A and R are true but R is NOT the correct explanation of A
(2) A is true but R is false
(3) A is false but R is true
(4) Both A and R are true and R is the correct explanation of A
✅ (4) Both A and R are true and R is the correct explanation of A
85: Identify the correct statements: (NEET 2023)
A. Lenticels are the lens-shaped openings permitting the exchange of gases.
B. Bark formed early in the season is called hard bark.
C. Bark is a technical term that refers to all tissues exterior to vascular cambium.
D. Bark refers to periderm and secondary phloem.
E. Phellogen is single-layered in thickness.
Choose the correct answer from the options given below:
(1) A and D only
(2) A, B and D only
(3) B and C only
(4) B, C and E only
✅ (1) A and D only
86: Match List -I with List - II.
Choose the correct answer from the options given below.
(a) (b) (c) (d)
(1) (iv) (i) (iii) (ii)
(2) (iii) (i) (iv) (ii)
(3) (ii) (iii) (iv) (i)
(4) (iv) (ii) (i) (iii) (NEET 2021)
✅ (2) (iii) (i) (iv) (ii)
87: Identify the incorrect statement. (NEET 2020)
(1) Sapwood is the innermost secondary xylem and is lighter in colour.
(2) Due to deposition of tannins, resins, oils etc., heart wood is dark in colour.
(3) Heart wood does not conduct water but gives mechanical support.
(4) Sapwood is involved in conduction of water and minerals from root to leaf.
✅ (1) Sapwood is the innermost secondary xylem and is lighter in colour.
88: Which of the statements given below is not true about formation of Annual Rings in trees?
(1) Annual ring is a combination of spring wood and autumn wood produced in a year.
(2) Differential activity of cambium causes light and dark bands of tissue - early and late wood respectively.
(3) Activity of cambium depends upon variation in climate.
(4) Annual rings are not prominent in trees of temperate region. (NEET 2019)
✅ (4) Annual rings are not prominent in trees of temperate region.
89: Secondary xylem and phloem in dicot stem are produced by (NEET 2018)
(1) Apical meristems
(2) Vascular cambium
(3) Phellogen
(4) Axillary meristems
✅ (2) Vascular cambium
90: Plants having little or no secondary growth are
(1) Grasses
(2) Deciduous angiosperms
(3) Cortex
(4) Cycads (NEET 2018)
✅ (1) Grasses
91: The vascular cambium normally gives rise to
(1) primary phloem
(2) secondary xylem
(3) periderm
(4) phelloderm (NEET 2017)
✅ (2) secondary xylem
92: Which of the following is made up of dead cells?
(1) Collenchyma
(2) Phellem
(3) Phloem
(4) Xylem parenchyma (NEET 2017)
✅ (2) Phellem
93: Identify the wrong statement in context of heartwood. (NEET 2017)
(1) It is highly durable.
(2) It conducts water and minerals efficiently.
(3) It comprises dead elements with highly lignified walls.
(4) Organic compounds are deposited in it.
✅ (2) It conducts water and minerals efficiently.
94: The balloon-shaped structures called tyloses
(1) originate in the lumen of vessels
(2) characterise the sapwood
(3) are extensions of xylem parenchyma cells into vessels
(4) are linked to the ascent of sap through xylem vessels (NEET-II 2016)
✅ (3) are extensions of xylem parenchyma cells into vessels
Model Questions
95: Interfascicular cambium is found
(1) Between two vascular bundles
(2) Between pith and vascular bundle
(3) In the vascular bundle
(4) Outside the bundle
✅ (1) Between two vascular bundles
96: Heartwood differs from sapwood in
(1) Presence of rays and fibres
(2) Absence of vessels and parenchyma
(3) Having dead and non-conducting elements
(4) Being susceptible to pests and pathogens
✅ (3) Having dead and non-conducting elements
97: Tyloses an outgrowth from ray or axial parenchyma cell into the lumen of a vessel which partially or completely blocks the cavity are present in
(1) Periderm
(2) Heartwood
(3) Sapwood
(4) Secondary cortex
✅ (2) Heartwood
98: The study of determination of age of tree by counting annual rings is called
(1) Dendrology
(2) Chronology
(3) Dendrochronology
(4) Gerontology
✅ (3) Dendrochronology
99: Which one is known as early wood?
(1) Autumn wood
(2) Spring wood
(3) Heartwood
(4) Sapwood
✅ (2) Spring wood
100: Regarding activity of cambial ring, select the incorrect statement from the following.
(1) The cambial ring becomes active and cut off new cells, towards the inner and outer sides.
(2) The cells cut off towards pith, mature into secondary phloem and the cells cut off towards periphery mature into secondary xylem.
(3) Cambium is more active on the inner side than on the outer.
(4) At some places, cambium forms a narrow band of parenchyma, which passes through the secondary xylem and the secondary phloem to form secondary medullary rays.
✅ (2) The cells cut off towards pith, mature into secondary phloem and the cells cut off towards periphery mature into secondary xylem.
101: In a dicotyledonous stem, the sequence of tissues from outer to inner is
(1) Phellem – pericycle – endodermis – phloem
(2) Phellem – phloem – endodermis – pericycle
(3) Phellem – endodermis – pericycle – phloem
(4) Pericycle – phellem – endodermis – phloem
✅ (3) Phellem – endodermis – pericycle – phloem
102: Phellogen, phellem, and phelloderm are collectively known as
(1) Periderm
(2) Pericycle
(3) Bark
(4) Late wood
✅ (1) Periderm
103: A non-technical term that refers to all tissues such as periderm & secondary phloem exterior to the vascular cambium is
(1) Pericycle
(2) Cork
(3) Secondary cortex
(4) Bark
✅ (4) Bark
104: Choose the correct combination of labelling of a lenticel.
(1) A= complementary cells, B= epidermis, C= cork cambium, D= secondary cortex
(2) A= epidermis, B= complementary cells, C= secondary cortex D= cork cambium
(3) A= epidermis, B= secondary cortex, C= cork cambium, D= complementary cells
(4) A= epidermis, B= complementary cells, C= cork cambium, D= secondary cortex
✅ (4) A= epidermis, B= complementary cells, C= cork cambium, D= secondary cortex
105: A nail is driven into the trunk of a 30 years old tree at a point 1 m above the soil level. The tree grows in height at the rate of 0.5 m a year. After three years, nail will be
(1) 1 m above the soil level
(2) 1.5 m above the soil level
(3) 2 m above the soil level
(4) 2.5 m above the soil level
✅ (1) 1 m above the soil level
106: Choose the wrong statement.
(1) In dicot root, vascular cambium is completely secondary in origin.
(2) It originates from the tissue located just below the xylem bundles above the protoxylem.
(3) Secondary growth also occurs in stems and roots of gymnosperms.
(4) Secondary growth does not occur in monocotyledons.
✅ (2) It originates from the tissue located just below the xylem bundles above the protoxylem.