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NEET • BIOLOGY • ANATOMY OF FLOWERING PLANTS
Anatomy of flowering plants practice · Mixed difficulty
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61
Medium
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Understanding
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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.
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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.
63
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Understanding
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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.
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Understanding
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During the formation of primary plant body specific regions of apical meristem produces
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Correct option: D
All of these
Option D is correct because apical meristem produces all three tissue types: dermal, ground, and vascular.
65
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Understanding
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In dicot root, the vascular cambium are
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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.
66
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Understanding
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When the conditions are dry, a grass leaf curls inward to minimize water loss due to the pressure of
View answer and explanation
Correct option: D
Bulliform cells
Option D (Bulliform cells) is correct because bulliform cells in grass leaves lose turgor pressure under dry conditions, causing the leaf to curl inward and minimize water loss.
67
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Remembering
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The component of xylem which is living, is
View answer and explanation
Correct option: B
Xylem parenchyma
Option B is correct because xylem parenchyma is the only living component of xylem tissue.
68
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Understanding
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Pericycle is present
I. Just above the phloem
II. on the inner side of endodermis
Select the correct option
I. Just above the phloem
II. on the inner side of endodermis
Select the correct option
View answer and explanation
Correct option: C
I and II are correct
Option C (I and II are correct) is correct because the pericycle is located just above the phloem and on the inner side of the endodermis in roots.
69
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Understanding
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Which combination of tissues acts together to provide the support to the hypocotyl of a seedling
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Correct option: A
Epidermis and collenchyma
Option A (Epidermis and collenchyma) is correct because the epidermis provides an outer protective layer, and collenchyma provides flexible support to the hypocotyl.
70
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Remembering
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Root apical meristem is derived from the
View answer and explanation
Correct option: C
Radical part of embryo
Option C (Radical part of embryo) is correct because the root apical meristem develops from the radicle of the embryo.
71
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Remembering
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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.
72
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Remembering
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Conjoint collateral closed vascular bundle is found in
View answer and explanation
Correct option: A
Monocot stem
Conjoint collateral closed vascular bundles are characteristic of monocot stems because they lack cambium.
73
Easy
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Remembering
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The outermost layer of dicotyledonous root is called
View answer and explanation
Correct option: B
Epidermis
Option B (Epidermis) is correct because the epidermis is the outermost layer of the dicotyledonous root.
74
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Remembering
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Collenchyma is capable of providing mechanical strength because of having?
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Correct option: D
More thickened corners
Option D (More thickened corners) is correct because the uneven thickening, particularly at the corners of collenchyma cells, provides mechanical strength and flexibility.
75
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Remembering
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Exchange of gases between the outer atmosphere and internal tissue of the stem takes place by (in dicot stem)
View answer and explanation
Correct option: A
Lenticels
Option A (Lenticels) is correct because lenticels are pores in the periderm that allow for gas exchange in woody stems.
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Remembering
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Which of the following is present in monocot stem?
View answer and explanation
Correct option: D
Hypodermis
Option D (Hypodermis) is correct because the hypodermis is a distinct layer present in monocot stems, providing mechanical support.
77
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Remembering
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The cells arranged in multiple layers between the epidermis and pericycle is called
View answer and explanation
Correct option: D
Cortex
Option D (Cortex) is correct because the cortex is the region between the epidermis and the vascular cylinder (stele) in stems and roots.
78
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Understanding
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Vascular tissues of angiosperms differ from those of gymnosperms in
View answer and explanation
Correct option: D
All of these
Option D is correct because angiosperms have vessels in xylem, well-developed sieve tubes and companion cells in phloem, unlike gymnosperms.
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Remembering
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Conjuctive tissue is made up of
View answer and explanation
Correct option: A
Parenchymatous cells, i.e., in between the xylem and phloem
Option A (Parenchymatous cells, i.e., in between the xylem and phloem) is correct because conjunctive tissue, found between xylem and phloem, is composed of parenchymatous cells.
80
Easy
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Remembering
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Well developed pith is present in
View answer and explanation
Correct option: D
Maize root and cucurbit stem
Option D is correct because both maize root and cucurbit stem possess a well-developed pith, which is a central region of parenchyma cells.
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Analyzing
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Assertion: Apical and intercalary meristems
contribute to the growth in length, while the
lateral meristems cause increase in girth in maize.
Reason: Apical and intercalary meristems always
increase the height of plants.
contribute to the growth in length, while the
lateral meristems cause increase in girth in maize.
Reason: Apical and intercalary meristems always
increase the height of plants.
View answer and explanation
Correct option: D
If both Assertion and Reason are false
Option D is correct because both the assertion and the reason are false statements about plant growth.
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Understanding
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A tree grows 5 cm per year. What will be the height of a board fixed 10 cm above the base after 10 years?
View answer and explanation
Correct option: C
10 cm
Option C (10 cm) is correct because the board's height remains constant as the tree grows upwards from the apical meristem, not from the base.
83
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Remembering
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Interfascicular cambium is a
View answer and explanation
Correct option: D
Secondary Meristematic tissue
Option D (Secondary Meristematic tissue) is correct because interfascicular cambium develops from differentiated parenchyma cells, making it a secondary meristem.
84
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Remembering
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Primary function of epidermis is
View answer and explanation
Correct option: B
Protection
Option B (Protection) is correct because the epidermis acts as a protective layer for the plant, preventing water loss and pathogen entry.
85
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Understanding
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Parenchyma cells are associated with activity like?
View answer and explanation
Correct option: D
All
Option D (All) is correct because parenchyma cells are involved in assimilation, storage, and dedifferentiation.
86
Easy
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Understanding
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The age of tree can’t be determined by annual rings if the tree belongs to the
View answer and explanation
Correct option: D
Tropical forest
Option D (Tropical forest) is correct because trees in tropical forests often do not experience distinct seasonal changes, making annual ring formation less consistent or absent.
87
Hard
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Remembering
+4 | -1
Which sequence is true for ground tissue system from outer to inner side?
View answer and explanation
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.
88
Medium
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Analyzing
+4 | -1
Read the following statements and identify the incorrect ones.
(a) Intrafascicular and interfascicular cambium are the lateral meristems that participate in the secondary growth of dicot stem.
(b) The heartwood comprises dead elements with highly lignified cell walls.
(c) Phelloderm has thin walled parenchymatous cells.
(d) The oldest layer of phloem lies just outside the pericycle.
(e) Phloem parenchyma is absent in most of the monocots.
(a) Intrafascicular and interfascicular cambium are the lateral meristems that participate in the secondary growth of dicot stem.
(b) The heartwood comprises dead elements with highly lignified cell walls.
(c) Phelloderm has thin walled parenchymatous cells.
(d) The oldest layer of phloem lies just outside the pericycle.
(e) Phloem parenchyma is absent in most of the monocots.
View answer and explanation
Correct option: C
(d) only
Option C is correct. Statement (d) is incorrect because the oldest layer of phloem lies just outside the vascular cambium, not the pericycle.
89
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Understanding
+4 | -1
Cells in the meristematic phase of growth shows/have
View answer and explanation
Correct option: A
Large nucleus
Option A is correct because cells in the meristematic phase typically have a large nucleus.
90
Medium
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Application
+4 | -1
In number of growth rings in the year 2000 is 20 what will be number of rings in 2018
View answer and explanation
Correct option: D
38
Option D (38) is correct because the number of rings corresponds to the number of years of growth, so 2018 - 2000 + 20 = 38.
Revision notes and key takeaways
Review ANATOMY OF FLOWERING PLANTS in your textbook or class notes, then use this set to check your understanding.
Showing 61-90 of 394 questions