🌿 Class 11 Biology – Anatomy of Flowering Plants MCQs (15 Tough NEET 2026 Questions)

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✅ CLASS 11 BIOLOGY – CHAPTER-WISE ADVANCED MCQs
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🌿 CHAPTER 6 – ANATOMY OF FLOWERING PLANTS
🔥 Advanced, Long-Theory NEET-2026 Level MCQs (15 Qs)
Chapter 6 – Anatomy of Flowering Plants
Q51. A student prepares T.S. of a young dicot stem and a monocot stem. He observes the following:

(i) Vascular bundles are arranged in a ring in Slide A
(ii) Vascular bundles are scattered in Slide B
(iii) Cambium is present between xylem and phloem in Slide A
(iv) Bundle sheath of sclerenchyma completely surrounds each vascular bundle in Slide B

Based on all the above, which is the MOST accurate conclusion?
  • A) Slide A = Monocot stem, Slide B = Dicot stem
  • B) Slide A = Dicot stem, Slide B = Monocot stem
  • C) Both slides are monocot stems at different ages
  • D) Both are dicot stems but one is young and one is old
Chapter 6 – Anatomy of Flowering Plants
Q52. Consider the following features observed in a plant organ under microscope:

• Endodermis with Casparian strips
• Radial arrangement of xylem and phloem
• Xylem is exarch
• Pericycle present just inside endodermis

Which organ and type does it MOST LIKELY represent?
  • A) Dicot stem
  • B) Monocot stem
  • C) Dicot root
  • D) Leaf midrib of dicot
Chapter 6 – Anatomy of Flowering Plants
Q53. Assertion (A): Secondary growth in dicot stem leads to formation of annual rings.
Reason (R): Activity of vascular cambium is uniform throughout the year in all climates.
  • A) Both A and R are true, and R is the correct explanation of A
  • B) Both A and R are true, but R is NOT the correct explanation of A
  • C) A is true but R is false
  • D) A is false but R is true
Chapter 6 – Anatomy of Flowering Plants
Q54. A botanist observes a secondary xylem sample from a tree trunk and notes:

• Wide vessels with thin walls
• Large lumen
• Formed during period of active cambial activity

This wood is BEST identified as:
  • A) Autumn wood (late wood)
  • B) Spring wood (early wood)
  • C) Heartwood
  • D) Reaction wood
Chapter 6 – Anatomy of Flowering Plants
Q55. In a T.S. of a dicot root undergoing secondary growth, which of the following sequences is correct from centre outward?
  • A) Pith → Secondary xylem → Primary xylem → Vascular cambium → Secondary phloem → Pericycle → Cork cambium → Cork
  • B) Pith → Primary xylem → Secondary xylem → Vascular cambium → Secondary phloem → Pericycle → Cork cambium → Cork
  • C) Pith → Vascular cambium → Primary xylem → Secondary xylem → Secondary phloem → Endodermis → Pericycle
  • D) Primary xylem → Secondary xylem → Vascular cambium → Secondary phloem → Endodermis → Cork
Chapter 6 – Anatomy of Flowering Plants
Q56. A ring of vascular bundles with interfascicular cambium forming a continuous cambial ring is a characteristic of:

(i) Young dicot stem
(ii) Gymnosperm stem
(iii) Monocot stem with anomalous secondary growth

Which combination is most correct?
  • A) Only (i)
  • B) Only (ii)
  • C) (i) and (ii)
  • D) (i), (ii) and (iii)
Chapter 6 – Anatomy of Flowering Plants
Q57. In a woody dicot stem, heartwood differs from sapwood in that heartwood:
  • A) Conducts water more efficiently than sapwood
  • B) Has living parenchyma with active metabolism
  • C) Is darker, more compressed, and provides mechanical support
  • D) Contains functional, newly formed vessels
Chapter 6 – Anatomy of Flowering Plants
Q58. A plant shows the following features:

• Stomata are mostly on upper surface
• Palisade parenchyma is present on both sides of leaf
• Spongy parenchyma is poorly developed

Such a leaf belongs to:
  • A) Typical dorsiventral leaf of dicot growing in shade
  • B) Typical isobilateral leaf of monocot
  • C) Dicot leaf of xerophyte adapted to high light
  • D) Submerged hydrophyte leaf
Chapter 6 – Anatomy of Flowering Plants
Q59. In which of the following tissues is lignin deposition a major biochemical feature, and what is its principal function?
  • A) Collenchyma – providing elastic support to young stems
  • B) Sclerenchyma fibres – providing mechanical rigidity
  • C) Parenchyma – storage of food
  • D) Epidermis – prevention of water loss
Chapter 6 – Anatomy of Flowering Plants
Q60. A farmer applies a girdling (removal of a ring of bark) around the trunk of a tree. After some months, he notices:

• Swelling of the region just above the girdle
• Gradual death of roots first, then the whole plant

Which main anatomical reason explains this phenomenon?
  • A) Water conduction through xylem is blocked
  • B) Food transport via phloem is interrupted, leading to accumulation above girdle
  • C) Cambial activity completely stops immediately
  • D) Gas exchange through lenticels stops
Chapter 6 – Anatomy of Flowering Plants
Q61. Which of the following correctly matches tissue, cell type and its position in a dicot root?
  • A) Exodermis – thin-walled cells with Casparian strips
  • B) Endodermis – cells with Casparian strips, innermost layer of cortex
  • C) Pericycle – outermost layer of cortex
  • D) Pith – present prominently in centre of all roots
Chapter 6 – Anatomy of Flowering Plants
Q62. A T.S. of a monocot root and dicot root are observed. Which combination is correct?

1. Large pith – typical of monocot root
2. Exarch xylem – present in both
3. Polyarch xylem (many xylem bundles) – more common in monocot root
4. Secondary growth with cambial ring – typical of monocot root

Choose the correct set:
  • A) 1, 2 and 3 only
  • B) 2 and 4 only
  • C) 1 and 4 only
  • D) 1, 2, 3 and 4
Chapter 6 – Anatomy of Flowering Plants
Q63. Assertion (A): Collenchyma is generally absent in roots but common in stems and petioles.
Reason (R): Collenchyma provides tensile strength and flexibility where bending and mechanical stress due to wind etc. are frequent.
  • A) Both A and R are true, and R is correct explanation of A
  • B) Both A and R are true, but R is NOT the correct explanation of A
  • C) A is true but R is false
  • D) A is false but R is true
Chapter 6 – Anatomy of Flowering Plants
Q64. A section shows the following features under microscope:

• Epidermis with thick cuticle and sometimes trichomes
• Multiple layers of collenchymatous hypodermis
• Large pith
• Vascular bundles are conjoint, collateral, and open with cambium present

Which plant part and type is this best identified as?
  • A) Dicot stem
  • B) Monocot stem
  • C) Dicot root
  • D) Monocot root
Chapter 6 – Anatomy of Flowering Plants
Q65. An anomalous secondary growth pattern is observed where extrastelar cambium produces a large amount of conjunctive tissue and additional vascular bundles in successive rings. This type of secondary growth is characteristic of:
  • A) Sunflower (Helianthus)
  • B) Maize (Zea mays)
  • C) Beet and Bougainvillea
  • D) Pea (Pisum sativum)
NEET-Style Result – Chapter 6
Marking: +4 for correct · –1 for wrong · 0 for unattempted.

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