NEET Biology Anatomy of Flowering Plants MCQs Set 08

Multiple Choice Questions (MCQs) for NEET Biology: Anatomy Of Flowering Plants

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Practice Anatomy Of Flowering Plants MCQs for NEET Biology

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Multiple Choice Questions

Question 1: The balloon-shaped structures called tyloses
(a) Originate in the lumen of vessels
(b) Characterize the sapwood
(c) Are extensions of xylem parenchyma cells into vessels
(d) Are linked to the ascent of sap through xylem vessels
Show Answer & Explanation

Answer: (c) Are extensions of xylem parenchyma cells into vessels

Explanation:
1. Tyloses are balloon - shaped structures in xylem vessels developed by xylem parenchyma cells.

Question 2: Specialised epidermal cells surrounding the guard cells are called
(a) Lenticels
(b) Complementary cells
(c) Subsidiary cells
(d) Bulliform cells
Show Answer & Explanation

Answer: (c) Subsidiary cells

Explanation:
1. Few epidermal cells, in the vicinity of the guard cells become specialised in their shape and size and are known as subsidiary cells.
2. The stomatal aperture, guard cells and the surrounding subsidiary cells are together called stomatal apparatus.

Question 3: Read the different components from (a) to (d) in the list given below and tell the correct order of the components with reference to their arrangement from outer side to inner side in a woody dicot stem<br />(a) Secondary cortex (b) Wood (c) Secondary phloem (d) Phellem The correct order is
(a) (d), (c), (a), (b)
(b) (c), (d), (b), (a)
(c) (a), (b), (d), (c)
(d) (d), (a), (c), (b)
Show Answer & Explanation

Answer: (d) (d), (a), (c), (b)

Explanation:
1. Sequence of different components of woody dicot stem from outerside to inner side is: Phellem Secondary Secondary Wood (Cork) Cortex Phloem (Secondary Xylem) Outermost Innermost.

Question 4: Vascular bundles in monocotyledons are considered closed because
(a) Xylem is surrounded all around by phloem
(b) A bundle sheath surrounds each bundle
(c) Cambium is absent
(d) There are no vessels with perforations
Show Answer & Explanation

Answer: (c) Cambium is absent

Explanation:
1. This option, Cambium is absent, is the one that agrees with the standard NCERT facts for this topic.

Question 5: You are given a fairly old piece of dicot stem and a dicot root. Which of the following anatomical structures will you use to distinguish between the two?
(a) Secondary xylem
(b) Secondary phloem
(c) Protoxylem
(d) Cortical cells
Show Answer & Explanation

Answer: (c) Protoxylem

Explanation:
1. Stem - Endarch xylem Root - Exarch xylem.

Question 6: Tracheids differ from other tracheary elements in:
(a) Having casparian strips
(b) Being imperforate
(c) Lacking nucleus
(d) Being lignified
Show Answer & Explanation

Answer: (b) Being imperforate

Explanation:
1. Tracheids differ from vessels in being imperforate i.e, tracheids have end walls.

Question 7: Age of a tree can be estimated by
(a) Biomass
(b) Number of annual rings
(c) Diameter of its heartwood
(d) Its height and girth
Show Answer & Explanation

Answer: (b) Number of annual rings

Explanation:
1. The process is called dendrochronology.
2. In each year, in temperate region, two rings are formed, One in spring season (spring or early wood) Second in autumn season (autumn or late wood).

Question 8: Closed vascular bundles lack
(a) Cambium
(b) Pith
(c) Ground tissue
(d) Conjunctive tissue
Show Answer & Explanation

Answer: (a) Cambium

Explanation:
1. Phloem No cambium Xylem Closed vascular bundle So, no secondary growth is required. e.g., monocots.

Question 9: The common bottle cork is a product of
(a) Xylem
(b) Vascular cambium
(c) Dermatogen
(d) Phellogen
Show Answer & Explanation

Answer: (d) Phellogen

Explanation:
1. Also called cork cambium, which cuts off or produces cork cells towards outer side which later on become suberised.

Question 10: Function of companion cells is
(a) Loading of sucrose into sieve elements by passive transport
(b) Loading of sucrose into sieve elements
(c) Providing energy to sieve elements for active transport
(d) Providing water to phloem
Show Answer & Explanation

Answer: (b) Loading of sucrose into sieve elements

Explanation:
1. This option, Loading of sucrose into sieve elements, is the one that agrees with the standard NCERT facts for this topic.

Question 11: In land plants, the guard cells differ from other epidermal cells in having
(a) Chloroplasts
(b) Cytoskeleton
(c) Mitochondria
(d) Endoplasmic reticulum
Show Answer & Explanation

Answer: (a) Chloroplasts

Explanation:
1. This option, Chloroplasts, is the one that agrees with the standard NCERT facts for this topic.

Question 12: Some vascular bundles are described as open because these
(a) Possess conjunctive tissue between xylem and phloem
(b) Are not surrounded by pericycle
(c) Are surrounded by pericycle but no endodermis
(d) Are capable of producing secondary xylem and phloem
Show Answer & Explanation

Answer: (d) Are capable of producing secondary xylem and phloem

Explanation:
1. They have cambium, found in dicot stem Phloem Cambium Xylem Open vascular bundle.

Question 13: The chief water conducting elements of xylem in gymnosperms are
(a) Tracheids
(b) Vessels
(c) Fibers
(d) Transfusion tissue
Show Answer & Explanation

Answer: (a) Tracheids

Explanation:
1. Vessels are not present in gymnosperms.
2. Fibres are not meant for water conduction.
3. Transfusion tissue is present in leaves because gymnosperms lack lateral veins.

Question 14: Transport of food material in higher plants takes place through
(a) Companion cells
(b) Transfusion tissue
(c) Tracheids
(d) Sieve elements
Show Answer & Explanation

Answer: (d) Sieve elements

Explanation:
1. This option, Sieve elements, is the one that agrees with the standard NCERT facts for this topic.

Question 15: Anatomically fairly old dicotyledonous root is distinguished from the dicotyledonous stem by
(a) Absence of secondary phloem
(b) Presence of cortex
(c) Position of protoxylem
(d) Absence of secondary xylem
Show Answer & Explanation

Answer: (c) Position of protoxylem

Explanation:
1. In root, it is towards periphery → Exarch In stem, it is towards pith → Endarch.

Question 16: The annular and spirally thickened conducting elements generally develop in the protoxylem when the root or stem is
(a) Elongating
(b) Widening
(c) Differentiating
(d) Maturing
Show Answer & Explanation

Answer: (a) Elongating

Explanation:
1. Differentiating getting specialised for its function (water and mineral conduction).

Question 17: In barley stem, vascular, bundles are
(a) Closed and scattered
(b) Open and in a ring
(c) Closed and radial
(d) Open and scattered
Show Answer & Explanation

Answer: (a) Closed and scattered

Explanation:
1. This is so because barley is monocot Whereas – Closed radial → Monocot root Open scattered → Not found in monocot Open, ring → Dicot stem.

Question 18: Reduction in vascular tissue, mechanical tissue and cuticle is characteristic of
(a) Mesophytes
(b) Epiphytes
(c) Hydrophytes
(d) Xerophytes
Show Answer & Explanation

Answer: (c) Hydrophytes

Explanation:
1. This is so because hydrophytes do not require prevention of water loss or strategy for more absorption.
2. They dwell in water abundant environment so they have to be flexible according to the flow of water therefore they lack mechanical tissue.
3. Whereas Xerophytes : Live in water scarce environment Mesophytes : Moderate environment Epiphytes : Moderate, they climb/twine over trees for sunlight eg.
4. Orchids.

Question 19: Vascular tissues in flowering plants develop from
(a) Dermatogen
(b) Phellogen
(c) Plerome
(d) Periblem
Show Answer & Explanation

Answer: (c) Plerome

Explanation:
1. Whereas . Dermatogen → Epidermis . Phellogen → Cork cambium . Periblem → Give rise to cortex.

Question 20: The length of different internodes in a culm of sugarcane is variable because of
(a) Intercalary meristem
(b) Shoot apical meristem
(c) Position of axillary buds
(d) Size of leaf lamina at the node below each internode
Show Answer & Explanation

Answer: (a) Intercalary meristem

Explanation:
1. Intercalary meristem increases length of internodes.

Question 21: For a critical study of secondary growth in plants, which one of the following pairs is suitable?
(a) Wheat and maiden hair fern
(b) Sugarcane and sunflower
(c) Teak and pine
(d) Deodar and fern
Show Answer & Explanation

Answer: (c) Teak and pine

Explanation:
1. This is so because there is no secondary growth in fern (Pteridophyte) Wheat and sugarcane → Monocots.

Question 22: Passage cells are thin- walled cells found in:
(a) Central region of style through which the pollen tube grows towards the ovary.
(b) Endodermis of roots facilitating rapid transport of water from cortex to pericycle.
(c) Phloem elements that serve as entry points for substances for transport to other plant parts.
(d) Testa of seed to enable emergence of growing embryonic axis during seed germination
Show Answer & Explanation

Answer: (b) Endodermis of roots facilitating rapid transport of water from cortex to pericycle.

Explanation:
1. Passage cells are thin walled cells are found in endodermis of root opposite to protoxylem elements.

Question 23: A common structural feature of vessel elements and sieve tube elements is
(a) Thick secondary walls
(b) Pores on lateral walls
(c) Presence of P-protein
(d) Enucleate condition
Show Answer & Explanation

Answer: (d) Enucleate condition

Explanation:
1. They lack nucleus, vessel are dead elements of xylem.
2. In case of sieve tube it has cytoplasm and its functions are controlled by companion cell.
3. Cytoplasm Sieve tube Companion cell element Pits Nucleus Vessel Sieve plate.

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Multiple Choice Questions (MCQs) for NEET Biology Anatomy Of Flowering Plants

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