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NEET • BIOLOGY • ANATOMY OF FLOWERING PLANTS
Anatomy of flowering plants practice · Medium
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31
Medium
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Understanding
+4 | -1
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.
32
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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.
33
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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.
34
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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
View answer and explanation
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.
35
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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.
36
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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.
37
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Remembering
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Collenchyma is capable of providing mechanical strength because of having?
View answer and explanation
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.
38
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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.
39
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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.
40
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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.
41
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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.
42
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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.
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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.
44
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Analyzing
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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.
45
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Application
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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.
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46
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Remembering
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All the tissues on the innerside of the endodermis constitutes together to form
View answer and explanation
Correct option: D
Stele
Option D (Stele) is correct because the stele includes all tissues inside the endodermis, such as the pericycle, vascular bundles, pith, and conjunctive tissue.
47
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Understanding
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A mature sieve tube differs from a vessel in
View answer and explanation
Correct option: B
Absence of lignified walls
Option B (Absence of lignified walls) is correct because sieve tubes have cellulose walls, while vessels have lignified walls for support.
48
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Understanding
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Select the wrong statements
I. Primary and secondary phloem gets crushed during secondary growth
II. During secondary growth, primary xylem remains more or less intact
I. Primary and secondary phloem gets crushed during secondary growth
II. During secondary growth, primary xylem remains more or less intact
View answer and explanation
Correct option: D
Both are correct
Option D (Both are correct) is correct because during secondary growth, primary and secondary phloem are crushed, and primary xylem remains intact.
49
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Understanding
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Grass leaves curl inwards during very dry weather. Select the most appropriate reason from the following
View answer and explanation
Correct option: B
Flaccidity of bulliform cells
Option B (Flaccidity of bulliform cells) is the most appropriate reason because when bulliform cells lose water and become flaccid, the leaf curls inward to reduce water loss.
50
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Remembering
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Which is true for Meristematic tissue?
View answer and explanation
Correct option: A
Their cells have dense cytoplasm and prominent nuclei
Option A (Their cells have dense cytoplasm and prominent nuclei) is correct because meristematic cells are actively dividing and require these features.
51
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Analyzing
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Assertion: Stomata are absent in submerged
hydrophytes.
Reason: Respiration occurs by means of air
chambers in submerged plants.
hydrophytes.
Reason: Respiration occurs by means of air
chambers in submerged plants.
View answer and explanation
Correct option: B
If both Assertion and Reason are true but Reason
is not the correct explanation of Assertion
is not the correct explanation of Assertion
Option B is correct. Both the assertion and the reason are true, but the reason is not the correct explanation for the assertion. Submerged hydrophytes lack stomata, and respiration occurs through general body surface, not specifically through air chambers.
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Understanding
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I. Made up of sclerenchymatous cells
II. Generally absent in primary phloem
III. Much elongated and pointed
Given above characters belongs to which of the following?
II. Generally absent in primary phloem
III. Much elongated and pointed
Given above characters belongs to which of the following?
View answer and explanation
Correct option: A
Phloem fibre
Option A (Phloem fibre) is correct because phloem fibres are sclerenchymatous, generally absent in primary phloem, and are elongated and pointed.
53
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Analyzing
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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:
(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:
View answer and explanation
Correct option: A
Monocotyledonous stem
Option A (Monocotyledonous stem) is correct because the anatomical features described are characteristic of a monocot stem.
54
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Remembering
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Casparian strips on endodermis are seen in
View answer and explanation
Correct option: A
Monocot root
Option A is correct. Casparian strips are found on the endodermis of monocot roots, helping to regulate water and nutrient uptake.
55
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Understanding
+4 | -1
Read the following statements
(i) Multicellular epidermal hair (ii) Collenchymatous hypodermis
(iii) Pith present (iv)Vascular bundles present in a ring i.e eustele
Above given features describe which of the following plant parts ?
(i) Multicellular epidermal hair (ii) Collenchymatous hypodermis
(iii) Pith present (iv)Vascular bundles present in a ring i.e eustele
Above given features describe which of the following plant parts ?
View answer and explanation
Correct option: C
Dicot stem
Option C (Dicot stem) is correct because dicot stems have multicellular epidermal hairs, collenchymatous hypodermis, a pith, and vascular bundles arranged in a ring (eustele).
56
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Understanding
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The functions of sieve tubes are controlled by
View answer and explanation
Correct option: C
Nucleus of companion cells
Option C (Nucleus of companion cells) is correct because companion cells, being closely associated with sieve tubes, provide the necessary proteins and other factors for sieve tube function through their nucleus.
57
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Understanding
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What differentiates leaf of dicots from monocots?
View answer and explanation
Correct option: B
Differentiation of palisade and spongy parenchyma
Option B (Differentiation of palisade and spongy parenchyma) is correct because dicot leaves have distinct palisade and spongy parenchyma layers, while monocot leaves typically have a uniform mesophyll.
58
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Remembering
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Intercalary meristem is a derivative of
View answer and explanation
Correct option: C
Primary meristem
Option C (Primary meristem) is correct because intercalary meristems are derived from primary meristems.
59
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Understanding
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Vessels differ from tracheids
View answer and explanation
Correct option: C
In having vertical row of cells with crosswalls dissolved
Option C (In having vertical row of cells with crosswalls dissolved) is correct because vessels are formed from a vertical row of cells where the cross-walls between the cells dissolve, creating a continuous tube for efficient water transport, unlike tracheids.
60
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Remembering
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Aerenchyma is found in:
View answer and explanation
Correct option: A
Parenchyma
Option A (Parenchyma) is correct because aerenchyma is a specialized type of parenchyma tissue characterized by large air spaces.
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 31-60 of 199 questions