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NEET • BIOLOGY • ANATOMY OF FLOWERING PLANTS
Anatomy of flowering plants practice · Hard
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1
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Which type of Tissues can be involved in photosynthesis
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Correct option: D
All of these
Option D (All of these) is correct because parenchyma, collenchyma, and chlorenchyma tissues can be involved in photosynthesis.
2
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For a critical study of secondary growth in plants, which one of the following pairs is suitable?
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Correct option: B
Teak and pine
Option B (Teak and pine) is correct because both teak (a dicot) and pine (a gymnosperm) exhibit significant secondary growth, making them suitable for studying this process.
3
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In the monocot root, we observe:
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Correct option: A
suberised exodermis, polyarch xylem, pith
Option A (suberised exodermis, polyarch xylem, pith) is correct because monocot roots typically have a suberised exodermis, many xylem bundles (polyarch), and a well-developed pith.
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In old trees, central dark coloured, non – conducting part of secondary xylem is referred to as?
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Correct option: A
Heart wood
Option A (Heart wood) is correct because heartwood is the central, dark-colored, non-conducting part of secondary xylem in old trees.
5
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Consider the following statements.
Statement I: Hypodermis is sclerenchymatous in maize stem.
Statement II: Unequal size vascular bundle present in maize stem.
Select the correct option.
Statement I: Hypodermis is sclerenchymatous in maize stem.
Statement II: Unequal size vascular bundle present in maize stem.
Select the correct option.
View answer and explanation
Correct option: C
Both Statement I and Statement II are correct
Option C (Both Statement I and Statement II are correct) is correct because maize stem has a sclerenchymatous hypodermis and vascular bundles of unequal size.
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Stele is constituted by all given tissues, except
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Correct option: B
Endodermis
Option B is correct because the endodermis, while surrounding the stele, is not considered a part of the stele itself.
7
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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
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Correct option: B
Heartwood
Option B (Heartwood) is correct because tyloses are characteristic features of heartwood, which is the non-conducting, older wood in the center of the tree.
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Cambium is considered as a lateral meristem because
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Correct option: B
It causes increase in girth.
Option B is correct because cambium is a lateral meristem responsible for secondary growth, leading to an increase in the plant's girth.
9
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The surface area of leaves in monocotyledon plant can be regulated by the help of
View answer and explanation
Correct option: C
Bulliform cells
Option C (Bulliform cells) is correct because bulliform cells, present in the upper epidermis of monocot leaves, regulate leaf surface area by causing the leaf to curl or uncurl based on water availability.
10
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In the following, how the sapwood is converted into heartwood?
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Correct option: D
All of the above
Option D (All of the above) is correct because sapwood is converted to heartwood through protoplast degeneration, tylosis formation, and deposition of substances like resins, oils, and gums.
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The dead component of phloem is
View answer and explanation
Correct option: B
Phloem fibres
Option B is correct because phloem fibers are sclerenchyma cells, which are dead at maturity.
12
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Which anatomy of plants is being described by the statements given below?
(i) The cortex consists of several layers of thin-walled parenchyma cells with intercellular spaces.
(ii) The tangential as well as radial walls of the endodermal cells have a depostion of water-impermeable, waxy materialsuberin, in form of casparian strips.
(iii) Secondary growth takes place.
(iv) Pith is small or inconspicuous.
(i) The cortex consists of several layers of thin-walled parenchyma cells with intercellular spaces.
(ii) The tangential as well as radial walls of the endodermal cells have a depostion of water-impermeable, waxy materialsuberin, in form of casparian strips.
(iii) Secondary growth takes place.
(iv) Pith is small or inconspicuous.
View answer and explanation
Correct option: A
Dicotyledonous root
Option A is correct because the given features (cortex, casparian strips, secondary growth, inconspicuous pith) are characteristic of dicotyledonous roots.
13
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Secondary xylem and phloem in dicot stem are produced by?
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Correct option: B
Vascular cambium
Option B (Vascular cambium) is correct because the vascular cambium is a lateral meristem that produces secondary xylem (wood) and secondary phloem in dicot stems, leading to an increase in stem girth.
14
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Which of the following is present in monocot stem?
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Correct option: D
Hypodermis
Option D (Hypodermis) is correct because the hypodermis is a distinct layer present in monocot stems, providing mechanical support.
15
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Which sequence is true for ground tissue system from outer to inner side?
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Correct option: B
Cortex – endodermis – pericycle – conjuctive tissue – pith
Option B is correct. The correct sequence of ground tissue system from outer to inner side is: Cortex – endodermis – pericycle – conjunctive tissue – pith.
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16
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The stomata in an isobilateral leaf are
View answer and explanation
Correct option: D
Present on both the surfaces of epidermis
Option D (Present on both the surfaces of epidermis) is correct because isobilateral leaves (like those of monocots) have stomata distributed on both the adaxial and abaxial epidermal surfaces.
17
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The crunchy and granular feeling when we chew pear fruit is due to
View answer and explanation
Correct option: D
Sclerenchyma
Option D (Sclerenchyma) is correct because sclereids, a type of sclerenchyma cell, are responsible for the gritty texture in pears.
18
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Periderm includes:-
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Correct option: C
Phelloderm, Phellogen and phellem
Option C (Phelloderm, Phellogen and phellem) is correct because periderm consists of phelloderm, phellogen (cork cambium), and phellem (cork).
19
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Select the incorrect statement from the followings:
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Correct option: A
Open conjoint, collateral or bicollateral vascular bundles found in monocot stem.
Option A is correct because monocot stems have closed, not open, vascular bundles.
20
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Application
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A dendrochronologist observed total 22 rings of spring wood and autumn wood in a dicot stem in 1998. How many annual rings will be observed by him in 2007 ?
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Correct option: C
20
Option C (20) is correct because the number of annual rings observed in a given year reflects the growth up to that year, so the number of rings observed in 1998 does not change the number of rings observed in 2007.
21
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Collenchymatous hypodermis occurs in?
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Correct option: A
Dicot stem
Option A (Dicot stem) is correct because dicot stems typically have a collenchymatous hypodermis, which provides support to the stem.
22
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Dermatogen, periblem and plerome are
View answer and explanation
Correct option: B
Meristematic tissues
Option B (Meristematic tissues) is correct because dermatogen, periblem, and plerome are layers of the apical meristem in the shoot apex.
23
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As compared to spring wood, autumn wood has?
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Correct option: D
Fewer xylary elements with narrow vessels
Option B (More number of xylary elements with narrow vessels) is correct because autumn wood (late wood) is characterized by a higher number of xylary elements with narrower vessels compared to spring wood.
24
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A piece of wood having no vessels (trachea) must be belonged to
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Correct option: C
Pine
Option C (Pine) is correct because pine is a gymnosperm, and gymnosperms lack vessels (trachea) in their wood; they only have tracheids.
25
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Assertion (A): In roots vascular bundles show radial arrangement of xylem and phloem.
Reason (R): In roots arrangement of xylem and phloem on different radii facilitates absorption process.
Reason (R): In roots arrangement of xylem and phloem on different radii facilitates absorption process.
View answer and explanation
Correct option: A
Both (A) & (R) are true and the (R) is the correct explanation of the (A)
Option A is correct because radial arrangement facilitates absorption in roots.
26
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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?
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Correct option: C
With the help of vascular bundles.
Option C is correct because the arrangement and characteristics of vascular bundles are key distinguishing features between monocot and dicot stems.
27
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Which of the following have living cytoplasm?
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Correct option: D
Companion cells
Option D (Companion cells) is correct because companion cells are living cells with cytoplasm and a nucleus, unlike vessels, tracheids, and sclerenchyma which are dead at maturity.
28
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A narrow layer of thin walled cells found between phloem/bark and wood of a dicot is
View answer and explanation
Correct option: B
Vascular cambium
Option B (Vascular cambium) is correct because the vascular cambium is a narrow layer of thin-walled cells located between the phloem/bark and wood in dicots.
29
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Radial vascular bundles characteristically occur in?
View answer and explanation
Correct option: C
Monocot and Dicot roots
Option C (Monocot and Dicot roots) is correct because radial vascular bundles, where xylem and phloem alternate in radii, are characteristic of both monocot and dicot roots.
30
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Pericycle is Sclerenehymatous in
View answer and explanation
Correct option: B
Dicot stem
Option C (Dicot root) is correct because the pericycle in dicot roots is made up of sclerenchymatous cells.
Revision notes and key takeaways
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Key Takeaways
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