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NEET • BIOLOGY • ANATOMY OF FLOWERING PLANTS
Anatomy of flowering plants practice · Medium
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Understanding
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Vascular bundles in monocotyledons are considered closed because
View answer and explanation
Correct option: D
There is no cambium
Vascular bundles in monocotyledons are considered closed because they lack cambium, which prevents secondary growth.
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I. It is made up of elongated, compactly arranged cells
II. It is usually single layered
III. It is parenchymatous
IV. Large vacuole is present
Which of the above characters belong to the epidermis?
II. It is usually single layered
III. It is parenchymatous
IV. Large vacuole is present
Which of the above characters belong to the epidermis?
View answer and explanation
Correct option: D
All of these
Option D is correct because all four characteristics accurately describe the epidermis: elongated cells, single-layered structure, parenchymatous nature, and the presence of a large vacuole.
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Remembering
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Central part of root occupied by parenchymatous (thin or thick walled) cells is called
View answer and explanation
Correct option: A
Pith
Option A (Pith) is correct because the pith is the central region of the root, composed of parenchymatous cells, which can be thin- or thick-walled.
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Remembering
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Casparian strips are present in the ……… of the root.
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Correct option: D
Endodermis
Option D (Endodermis) is correct because Casparian strips, made of suberin, are found in the radial and transverse walls of endodermal cells in roots.
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Remembering
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I. Vessel, II. Tracheids, III. Companion cells
Which of the following is/are living cells?
Which of the following is/are living cells?
View answer and explanation
Correct option: B
Only III
Option B (Only III) is correct because only companion cells are living cells among the given options; vessels and tracheids are dead at maturity.
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Understanding
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The balloon-shaped structures called tyloses
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Correct option: D
are extensions of xylem parenchyma cells into vessels
Option D is correct because tyloses are extensions of xylem parenchyma cells into vessels, blocking them.
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Remembering
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The meristem which is particularly present in the mature regions of roots and shoots and produce woody axis and appear later than the primary meristem is called
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Correct option: A
Secondary meristem
Option A (Secondary meristem) is correct because secondary meristems appear later than primary meristems and produce the woody axis in mature regions of roots and shoots.
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Remembering
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Cell wall of collenchyma composed of?
View answer and explanation
Correct option: D
All of these
Option D (All of these) is correct because the cell wall of collenchyma is composed of cellulose, hemicellulose, and pectin, which contribute to its thickening and flexibility.
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Understanding
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All types of Tissue systems have?
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Correct option: D
Parenchyma
Option D (Parenchyma) is correct because parenchyma is a fundamental tissue found in all tissue systems of plants.
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Analyzing
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Which of the following is incorrectly matched?
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Correct option: C
Vascular cambium in dicot root - Partly primary in origin
Option C is incorrectly matched. Vascular cambium in dicot roots is entirely secondary in origin, arising from conjunctive tissue and pericycle.
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Understanding
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The simple tissues which are dead and without protoplast performs all of the given functions, except
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Correct option: C
Performs photosynthesis
Option C (Performs photosynthesis) is correct because sclerenchyma is a dead tissue and cannot perform photosynthesis; photosynthesis is performed by parenchyma cells containing chloroplasts (chlorenchyma).
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Remembering
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‘Exarch’ is the condition of vascular bundles in which
View answer and explanation
Correct option: A
Protoxylem lies toward the outside and metaxylem lies inward
Option A (Protoxylem lies toward the outside and metaxylem lies inward) is correct because the exarch condition refers to the arrangement where protoxylem is located towards the periphery and metaxylem towards the center.
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Remembering
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I. Sunflower seed
II. A wheat leaf
III. Pea plant
IV. Leaf blade of grass
Bulliform cells are present in which of the above plants?
II. A wheat leaf
III. Pea plant
IV. Leaf blade of grass
Bulliform cells are present in which of the above plants?
View answer and explanation
Correct option: D
II and IV
Option D (II and IV) is correct because bulliform cells are found in the leaves of grasses, such as wheat and other grass species.
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Remembering
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In monocot roots, which type of vascular bundles are found?
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Correct option: B
Radial with exarch xylem
Option B is correct. Monocot roots have radial vascular bundles with exarch xylem, meaning the protoxylem is located towards the periphery.
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Understanding
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Which of the following statements are true?
I.Uneven thickening of cell well is characteristic of sclerenchyma.
II.Periblem forms the cortex of the stem and the root.
III.Tracheids are the chief water transporting elements in gymnosperms.
IV.Companion cell is devoid of nucleus at maturity.
V.The commercial cork is obtained from Quercus suber.
I.Uneven thickening of cell well is characteristic of sclerenchyma.
II.Periblem forms the cortex of the stem and the root.
III.Tracheids are the chief water transporting elements in gymnosperms.
IV.Companion cell is devoid of nucleus at maturity.
V.The commercial cork is obtained from Quercus suber.
View answer and explanation
Correct option: D
II, III and V
Option D (II, III and V) is correct because periblem forms the cortex, tracheids transport water in gymnosperms, and commercial cork comes from Quercus suber.
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Understanding
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Read the following statements and select the correct option.
A. Vascular cambium is completely secondary in origin in dicot roots
B. Casparian strips are seen in monocot root and stem.
A. Vascular cambium is completely secondary in origin in dicot roots
B. Casparian strips are seen in monocot root and stem.
View answer and explanation
Correct option: A
Only statement A is correct
Option A is correct because vascular cambium in dicot roots is entirely secondary in origin, while Casparian strips are found in endodermis of roots, not stems.
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Remembering
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In grasses, certain adaxial epidermal cells along the veins modify themselves into large empty, colourless cells called
View answer and explanation
Correct option: A
Bulliform cells
Option A (Bulliform cells) is correct because bulliform cells are large, empty, and colorless epidermal cells found in grasses that help in leaf rolling to reduce water loss.
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Remembering
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Which one of the following is not a lateral meristem?
View answer and explanation
Correct option: D
Intercalary meristem
Option D (Intercalary meristem) is correct because intercalary meristem is a type of primary meristem, while the others are lateral meristems.
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Remembering
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In dicot stem, vascular bundles are
View answer and explanation
Correct option: B
Arranged in a ring
Option B is correct because in dicot stems, vascular bundles are arranged in a ring.
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Remembering
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Characteristic feature of parenchyma is-
View answer and explanation
Correct option: D
Inter cellular spaces
Option D (Inter cellular spaces) is correct because the presence of intercellular spaces is a characteristic feature of parenchyma tissue.
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Understanding
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Abaxial surface of the leaf generally bears
View answer and explanation
Correct option: B
More stomata than adaxial epidermis
Option B (More stomata than adaxial epidermis) is correct because the abaxial (lower) surface of a leaf generally has more stomata than the adaxial (upper) surface to facilitate gas exchange while minimizing water loss.
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Understanding
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Statement (I): Xylem conducts water and minerals from leaves to roots.
Statement (II): Xylem also provides mechanical strength
Statement (II): Xylem also provides mechanical strength
View answer and explanation
Correct option: D
Statement - I is False, Statement - II is True.
Option D (Statement - I is False, Statement - II is True) is correct because xylem transports water and minerals from roots to leaves, and it provides mechanical strength.
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Analyzing
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A student while cutting transverse section of plant part observed scattered vascular bundles of various sizes, covered by bundle sheath cells. He also observed water containing cavities inside vascular bundle. This indicates that it is a transverse section of
View answer and explanation
Correct option: B
Maize stem
Option B (Maize stem) is correct because scattered vascular bundles, bundle sheath cells, and water-containing cavities are characteristic features of monocot stems like maize.
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Remembering
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Which of the following is true?
View answer and explanation
Correct option: B
Vessels are multicellular and with wide lumen
Option B is correct. Vessels are multicellular structures with a wide lumen, facilitating efficient water transport in angiosperms.
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Identify the living plant tissues, whose main function is to provide buoyancy to the plant.
View answer and explanation
Correct option: D
Modified parenchyma
Option D (Modified parenchyma) is correct because aerenchyma, a type of modified parenchyma, provides buoyancy to plants.
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On the basis of variation in form, structure, origin and development, sclerenchyma may be
View answer and explanation
Correct option: D
Both (1) and (2)
Option D (Both (1) and (2)) is correct because sclerenchyma can be found as both fibres and sclereids, varying in form, structure, origin, and development.
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Among the following attributes of xylem, which are mainly mechanical in function?
View answer and explanation
Correct option: A
Xylem fibre
Option A (Xylem fibre) is correct because xylem fibers are sclerenchyma cells with thick, lignified walls, providing mechanical strength and support to the plant.
28
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The roots of angiosperms show exarch xylem and their stems have endarch bundles. These are continuous throughout the change occurs in
View answer and explanation
Correct option: B
Hypocotyl region
Option B (Hypocotyl region) is correct because the hypocotyl is the transitional zone between the root and the stem, where the vascular arrangement changes from exarch to endarch.
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During the formation of primary plant body specific regions of apical meristem produces
View answer and explanation
Correct option: D
All of these
Option D is correct because apical meristem produces all three tissue types: dermal, ground, and vascular.
30
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In dicot root, the vascular cambium are
View answer and explanation
Correct option: A
Completely secondary in origin
Option A (Completely secondary in origin) is correct because the vascular cambium in dicot roots arises from conjunctive tissue and pericycle, both secondary tissues.
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Key Takeaways
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