NEET Biology Anatomy of Flowering Plants MCQs Set 07

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Chapter-wise Objective Questions: Anatomy Of Flowering Plants

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Multiple Choice Questions

Question 1: Tissue commonly known as passport point or biological check post is characterised by
(a) Bulliform cells and raphides
(b) Cystolith and motor cells
(c) Casparian bands and passage cells
(d) Passage cells and Fats
Show Answer & Explanation

Answer: (c) Casparian bands and passage cells

Explanation:
1. Casparian bands are the strip of suberin present in the endodermal layer of roots and act check point.
2. Passage cells allow the exchange in endodermis.

Question 2: Seat of origin of lateral root and formation of cork cambium are features related to
(a) Endodermis
(b) Pericycle
(c) Hypodermis
(d) Pith rays
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Answer: (b) Pericycle

Explanation:
1. Lateral roots arise from pericycle.

Question 3: Centripetal and centrifugal xylem are the important features of
(a) Root and stem respectively
(b) Exarch and endarch respectively
(c) Endarch and exarch respectively
(d) Both (1) & (2)
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Answer: (d) Both (1) & (2)

Explanation:
1. Root → Exarch → Centripetal xylem i.e., Protoxylem is formed towards periphery Stem → Endarch → Centrifugal i.e., Protoxylem is formed towards pith.

Question 4: Members of Winteraceae, Tetracentraceae and Trochodendraceae
(a) Do not have tracheids
(b) Do not have albuminous cells
(c) Do not have vessels
(d) More than one option is correct
Show Answer & Explanation

Answer: (d) More than one option is correct

Explanation:
1. These are primitive families, similar to gymnosperms.
2. Do not have albuminous cell Do not have vessels.

Question 5: The vascular bundles in the stems of most of dicots are conjoint, collateral and open. In each of these bundles
(a) Xylem and phloem are on the same radius with phloem towards the pith and xylem towards the pericycle without a strip of cambium between them
(b) Xylem and phloem are on the same radius with xylem situated towards the pith and phloem situated towards the pericycle and a strip of cambium separates the two
(c) Xylem completely surrounds the phloem on all sides but the two are separated by the cambium
(d) Phloem completely surrounds the xylem and a strip of cambium separates the two
Show Answer & Explanation

Answer: (b) Xylem and phloem are on the same radius with xylem situated towards the pith and phloem situated towards the pericycle and a strip of cambium separates the two

Explanation:
1. Phloem Xylem and phloem are on the same radius with xylem situated towards the pith Cambium and phloem towards the pericycle with a strip of cambium between them.
2. Xylem.

Question 6: Which is not true for monocot stem?
(a) Sclerenchymatous hypodermis
(b) Presence of water canals in pith
(c) Conjoint, collateral closed vascular bundles
(d) Presence of bundle sheath
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Answer: (b) Presence of water canals in pith

Explanation:
1. Water cavity or pith cavity are present in vascular bundles of monocot stem.

Question 7: Vascular bundles are conjoint, collateral, endarch and lack cambium between xylem and phloem in all, but not in
(a) Maize
(b) Barley
(c) Wheat
(d) Sunflower
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Answer: (d) Sunflower

Explanation:
1. Sunflower is dicot and it contains open vascular bundles i.e., cambium is present between xylem and phloem.

Question 8: Monocot stem differs from dicot stem in having
(a) Endarch xylem element
(b) Collateral V.B.
(c) Well developed pith
(d) Polymorphic vascular bundles
Show Answer & Explanation

Answer: (d) Polymorphic vascular bundles

Explanation:
1. They are multiple sized as their size depends upon size of veins.

Question 9: Vascular cambium is a meristematic layer that cuts off
(a) Primary xylem and primary phloem
(b) Xylem vessels and xylem tracheids
(c) Primary xylem and secondary xylem
(d) Secondary xylem, secondary phloem and medullary rays
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Answer: (d) Secondary xylem, secondary phloem and medullary rays

Explanation:
1. Cambium is responsible for secondary growth.

Question 10: Derivatives of the secondary meristem in the steler region are
(a) Phellem and phelloderm
(b) Alburnum and primary phloem
(c) Duramen and alburnum
(d) Primary xylem and secondary phloem
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Answer: (c) Duramen and alburnum

Explanation:
1. Secondary meristem in steler region is vascular cambium and it produces secondary xylem.

Question 11: What is the position of oldest secondary phloem?
(a) Just outside the pericycle
(b) Just outside the vascular cambium
(c) Just below the pericycle
(d) Below the vascular cambium
Show Answer & Explanation

Answer: (c) Just below the pericycle

Explanation:
1. Oldest secondary phloem - near pericycle Youngest secondary phloem - near cambium.

Question 12: Secondary growth in extrasteler region is due to activity of
(a) Interfascicular cambium
(b) Intrafascicular cambium
(c) Cork cambium
(d) Intercalary meristem
Show Answer & Explanation

Answer: (c) Cork cambium

Explanation:
1. Cork cambium arises due to dedifferentiation of tissue in extrasteler region.

Question 13: Seasonal activity of vascular cambium is influenced by many factors, except
(a) Geographical location of plant
(b) Relative humidity and temperature
(c) Photoperiod and water supply
(d) Leaf orientation
Show Answer & Explanation

Answer: (d) Leaf orientation

Explanation:
1. Environmental factors are responsible for seasonal activities of cambium.

Question 14: When secondary growth is initiated in dicot stem, what will happen first?
(a) The cells of cambium divide periclinally to form xylem mother cells
(b) Interfascicular cambium join with intrafascicular cambium
(c) Parenchymatous cells present between vascular bundles become meristematic
(d) Pith get obliterated
Show Answer & Explanation

Answer: (c) Parenchymatous cells present between vascular bundles become meristematic

Explanation:
1. Dedifferentiation of medullary ray cells present between vascular bundles.

Question 15: All given tissues are formed as a result of redifferentiation process, except
(a) Phellem
(b) Phelloderm
(c) Secondary xylem
(d) Interfascicular cambium
Show Answer & Explanation

Answer: (d) Interfascicular cambium

Explanation:
1. It is formed due to dedifferentiation of parenchyma of medullary rays.

Question 16: Vascular cambium of dicot root is purely secondary in origin and arise from
(a) Cells of conjuctive parenchyma just below phloem
(b) Cells of pericycle just outside protoxylem
(c) Cells of parenchyma between xylem and phloem
(d) More than one option is correct
Show Answer & Explanation

Answer: (d) More than one option is correct

Explanation:
1. Cells of conjunctive tissue, just below phloem and cells of pericycle, just outside protoxylem in dicot root forms vascular cambium.

Question 17: Vascular bundles in dicot leaves are
(a) Scattered, conjoint, collateral, open
(b) Scattered, conjoint, collateral, closed
(c) Scattered, conjoint, collateral, open
(d) Ringed, conjoint, collateral, closed
Show Answer & Explanation

Answer: (b) Scattered, conjoint, collateral, closed

Explanation:
1. Vascular bundles in dicot leaves are scattered, conjoint collateral, closed as they do not require secondary growth.

Question 18: Stomata in grass leaf are
(a) Dumb-bell shaped
(b) Kidney shaped
(c) Barrel shaped
(d) Rectangular
Show Answer & Explanation

Answer: (a) Dumb-bell shaped

Explanation:
1. Grass being a monocot, has Dumb-bell shaped stomata in their leaves.

Question 19: Plants having little or no secondary growth are
(a) Grasses
(b) Deciduous angiosperms
(c) Cycads
(d) Conifers
Show Answer & Explanation

Answer: (a) Grasses

Explanation:
1. Grasses are monocots and monocots usually do not have secondary growth.
2. Palm like monocots have anomalous secondary growth.

Question 20: Secondary xylem and phloem in dicot stem are produced by
(a) Apical meristems
(b) Vascular cambium
(c) Axillary meristems
(d) Phellogen
Show Answer & Explanation

Answer: (b) Vascular cambium

Explanation:
1. . Vascular cambium is partially secondary . Form secondary xylem towards its inside and secondary phloem towards outsides. . 4 – 10 times more secondary xylem is produced than secondary phloem.

Question 21: Identify the wrong statement in context of heartwood.
(a) Organic compounds are deposited in it
(b) It is highly durable
(c) It conducts water and minerals efficiently
(d) It comprises dead elements with highly lignified walls
Show Answer & Explanation

Answer: (c) It conducts water and minerals efficiently

Explanation:
1. Heartwood is physiologically inactive due to deposition of organic compounds and tyloses formation, so this will not conduct water and minerals.

Question 22: Which of the following is made up of dead cells?
(a) Xylem parenchyma
(b) Collenchyma
(c) Phellem
(d) Phloem
Show Answer & Explanation

Answer: (c) Phellem

Explanation:
1. Cork cambium undergoes periclinal division and cuts off thick walled suberised dead cork cells towards outside and it cuts off thin walled living cells i.e., phelloderm on inner side.

Question 23: Cortex is the region found between
(a) Epidermis and stele
(b) Pericycle and endodermis
(c) Endodermis and pith
(d) Endodermis and vascular bundle
Show Answer & Explanation

Answer: (a) Epidermis and stele

Explanation:
1. Cortex is the region present between epidermis and stele.

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Anatomy Of Flowering Plants Objective Questions & Solutions for NEET Biology

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