50 Most Important NEET PYQs of Chapter 6: Anatomy of Flowering Plants – Part 2 (Q26–50) | By neetpyqall

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🌿 50 Most Important NEET PYQs of Chapter 6: Anatomy of Flowering Plants – Part 2 (Q26–50) | By neetpyqall

Welcome back! This is Part 2 of the 50 Most Important NEET Previous Year Questions from the chapter Anatomy of Flowering Plants, covering Questions 26 to 50 with detailed solutions.

26. In monocot root, xylem and phloem are arranged in:

A) Conjoint, collateral
B) Conjoint, bicollateral
C) Radial
D) Amphivasal
✅ Answer: C) Radial
Explanation: Both monocot and dicot roots have radial vascular bundles, where xylem and phloem lie on different radii.

27. The cork cells are impervious to water because of:

A) Cellulose
B) Cutin
C) Suberin
D) Lignin
✅ Answer: C) Suberin
Explanation: Cork cells have suberin in their walls, making them impermeable to water and gases.

28. The xylem in plants is responsible for:

A) Transport of food
B) Transport of water
C) Transport of amino acids
D) Transport of hormones
✅ Answer: B) Transport of water
Explanation: Xylem conducts water and minerals from roots to aerial parts.

29. Which type of cell is not found in xylem?

A) Vessels
B) Sieve tubes
C) Tracheids
D) Xylem parenchyma
✅ Answer: B) Sieve tubes
Explanation: Sieve tubes are components of phloem, not xylem.

30. Heartwood differs from sapwood in:

A) Being lighter in colour
B) Lacking vessels
C) Conducting water
D) Being non-functional
✅ Answer: D) Being non-functional
Explanation: Heartwood is the central, dark, and non-conducting part of wood that provides mechanical strength.

31. The phloem tissue that remains alive even at maturity is:

A) Sieve tubes
B) Phloem parenchyma
C) Companion cells
D) All of these
✅ Answer: D) All of these
Explanation: Unlike xylem, phloem consists of living elements like sieve tubes, companion cells, and phloem parenchyma.

32. Which one is not a function of parenchyma?

A) Photosynthesis
B) Storage
C) Transport
D) Mechanical support
✅ Answer: D) Mechanical support
Explanation: Parenchyma is involved in storage and metabolism, not mechanical support.

33. Which cell type helps in lateral conduction in woody stems?

A) Xylem vessels
B) Medullary rays
C) Phloem fibres
D) Tracheids
✅ Answer: B) Medullary rays
Explanation: Medullary rays are parenchymatous tissues that help in radial transport of food and water.

34. Wood is actually:

A) Primary xylem
B) Secondary phloem
C) Secondary xylem
D) Cork
✅ Answer: C) Secondary xylem
Explanation: Secondary xylem formed during secondary growth forms the bulk of wood.

35. Annual rings are formed due to:

A) Secondary growth
B) Apical growth
C) Primary growth
D) Intercalary growth
✅ Answer: A) Secondary growth
Explanation: Unequal activity of vascular cambium during different seasons forms growth rings.

36. Xylem parenchyma stores:

A) Starch
B) Resin
C) Tannins
D) All of these
✅ Answer: D) All of these
Explanation: Xylem parenchyma stores food materials like starch and sometimes resin and tannins.

37. In dicot root, vascular bundles are:

A) Radial and open
B) Radial and closed
C) Conjoint and closed
D) Conjoint and open
✅ Answer: A) Radial and open
Explanation: Dicot roots have radial vascular bundles and secondary growth takes place – hence open.

38. A bicollateral vascular bundle contains:

A) Phloem on one side
B) Phloem on both sides of xylem
C) Only xylem
D) None
✅ Answer: B) Phloem on both sides of xylem
Explanation: Bicollateral bundles are found in plants like Cucurbita where xylem is sandwiched between two phloem patches.

39. Which meristem helps in formation of secondary xylem and phloem?

A) Apical meristem
B) Intercalary meristem
C) Lateral meristem
D) Primary meristem
✅ Answer: C) Lateral meristem
Explanation: Lateral meristems such as vascular cambium are responsible for secondary growth and produce secondary xylem and phloem.

40. The pith is well developed in:

A) Monocot stem
B) Dicot stem
C) Dicot root
D) Both A and B
✅ Answer: B) Dicot stem
Explanation: Dicot stems usually have a well-developed central pith made up of parenchymatous cells.

41. Protoxylem is the:

A) First formed xylem
B) Last formed xylem
C) Non-functional xylem
D) Mature xylem
✅ Answer: A) First formed xylem
Explanation: Protoxylem is the first xylem to mature and is formed during primary growth.

42. Lateral roots in dicot roots arise from:

A) Epidermis
B) Endodermis
C) Cortex
D) Pericycle
✅ Answer: D) Pericycle
Explanation: Lateral roots originate from the pericycle, making them endogenous in origin.

43. The vascular cambium produces:

A) Xylem inside, phloem outside
B) Xylem outside, phloem inside
C) Only xylem
D) Only phloem
✅ Answer: A) Xylem inside, phloem outside
Explanation: Vascular cambium forms secondary xylem towards the inside and phloem towards the outside.

44. Which one of the following is not part of phloem?

A) Sieve tube
B) Companion cell
C) Tracheid
D) Phloem parenchyma
✅ Answer: C) Tracheid
Explanation: Tracheids are components of xylem, not phloem.

45. Which type of tissue makes up the bulk of herbaceous dicot stem?

A) Xylem
B) Parenchyma
C) Collenchyma
D) Sclerenchyma
✅ Answer: B) Parenchyma
Explanation: The bulk of cortex and pith in herbaceous dicots is parenchyma.

46. Which of the following pair is mismatched?

A) Cork – Suberin
B) Collenchyma – Support
C) Sclerenchyma – Photosynthesis
D) Parenchyma – Storage
✅ Answer: C) Sclerenchyma – Photosynthesis
Explanation: Sclerenchyma is a dead supportive tissue and does not perform photosynthesis.

47. A tissue which lacks protoplasm when mature is:

A) Parenchyma
B) Collenchyma
C) Sclerenchyma
D) Phloem
✅ Answer: C) Sclerenchyma
Explanation: Mature sclerenchyma cells are dead and lack protoplasm.

48. The main function of phloem fibres is:

A) Transport
B) Conduction
C) Support
D) Storage
✅ Answer: C) Support
Explanation: Phloem fibres are thick-walled and provide mechanical support to the plant.

49. Vascular bundles in roots are always:

A) Closed
B) Collateral
C) Conjoint
D) Radial
✅ Answer: D) Radial
Explanation: Roots have radial vascular bundles where xylem and phloem are placed on alternate radii.

50. In secondary growth, cork replaces:

A) Phloem
B) Epidermis
C) Xylem
D) Cortex
✅ Answer: B) Epidermis
Explanation: During secondary growth, the periderm (cork, cork cambium, phelloderm) replaces the outer epidermis.

🎯 Done with Chapter 6 – Anatomy of Flowering Plants!
For more such NEET-targeted PYQ blogs, keep following:

🔗 neetpyqall.blogspot.com
🔗 biologyatease1.blogspot.com


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