Plant Anatomy MCQs for NEET

 

Question 1. Medullary rays are seen in:

1. Dicot root
2. Monocot root
3. Monocot stem
4. Dicot stems.

Answer: 4. Dicot stem.

Question 2. Phloem in the plants does the function of:

1. Photosynthesis
2. Providing support
3. Conduction of food
4. Conduction of water.

Answer: 3. Conduction of food

Question 3. Closing cells are found in:

1. Stomata
2. Sieve tubes
3. Lenticels
4. Wounded areas.

Answer: 3. Lenticels

Question 4. The secondary growth of stern results in:

1. Increase in diameter
2. Increase in length
3. Production of vegetative appendages
4. Production of floral appendages.

Answer: 1. Increase in diameter

Question 5. Aristolochia is a clirnber. The secondary growth is initially normal. But later some cells of intrafascicular cambium produce new cells. giving rise to a fluted vascular bundle. This anomalous type of secondary growth:

1. Is of the adaptive type for climbing
2. Is of non-adaptive type
3. Is of adaptive type as a large quantity of vascular bundles is not needed
4. This occurs because the inter-fascicular cambium also produces vascular bundles and ray parenchyma is needed for lateral expansion.

Answer: 1. Is of the adaptive type for climbing

Question 6. No secondary growth occurs in the monocot stem because:

• Vascular bundles are scattered
• Vascular bundles are closed
• Vascular bundles are enclosed by bundle sheath
• None of the above.

Answer: 2. Vascular bundles are closed

Question 7. Vascular bundles in the dicot stem are:

1. Conjoint and collateral
2. Conjoint and closed
3. Conjoint, collateral and open
4. Collateral and open.

Answer: 3. Conjoint, collateral and open

Question 8. Xylem in dicot stem is:

1. Exarch
2. Endarch
3. Mesarch
4. Polyarch.

Answer: 2. Endarch

Question 9. Bicollateral vascular bundles are found in:

1. Helianthus
2. Maize
3. Wheat
4. Cucurbits.

Answer: 4. Cucurbits.

Question 10. stele in dicot stem is:

1. Protosrele
2. Siphonostele
3. Eustele
4. Atactostele.

Answer: 3. Eustele

Question 11. Secondary growth in dicot stems is due to the activity of:

1. Xylem
2. Phloem
3. Cambium
4. Pith.

Answer: 3. Xylem

Question 12. Which of the following cells is often dead when functioning?

1. Sclerenchyma
2. Epidermis
3. Parenchyma
4. Aerenchyma.

Answer: 1. Sclerenchyma

Question 13. Which of the following tissues is composed of dead cells?

1. Epidermis
2. Xylem
3. Phloem
4. Ground.

Answer: 2. Xylem

Question 14. The bark of a tree comprises:

1. Only the cork
2. All the tissues outside the vascular cambium
3. The cork and secondary cortex
4. A dead tissue outside the vascular cambium.

Answer: 2. All the tissues outside the vascular cambium

Question 15. In dicot stem newly formed cells of seconda.ry phloem are found:

1. Outside The Vascular Cambium
2. Inside The Vascular Cambium
3. Outside The Pericycle
4. Inside The Pericycle.

Answer: 1. Outside The Vascular Cambium

Question 16. Aerenchymatous cells are present in hydrophytes for:

1. Gaseous exchange
2. Exchange of organic food
3. Movement of stomata
4. Removal of excess water.

Answer: 1. Gaseous exchange

Question 17. In which of the following occur radial vascular bundles?

1. Monocot root
2. Monocot stem
3. Dicot stem
4. All monocot and dicot stem.

Answer: 1. Monocot root

Question 18. Raphides are found in:

1. Citrus
2. Colocasia
3. Nerium
4. Mango.

Answer: 2. Colocasia

Question 19. Radial vascular bundles are found in:

1. Angiosperms stem
2. Angiosperms root
3. Angiosperms leaf
4. Angiosperms seed.

Answer: 2. Angiospermic root

Question 20. Lignified cells which are narrow and pointed at both ends, are called:

1. Collenchyma
2. Parenchyma
3. Stone cells
4. Sclerenchyrna.

Answer: 4. Sclerenchyrna.

Question 21. Duramen is:

1. Heartwood
2. Sapwood
3. Softwood
4. Hardwood.

Answer: 1. Heartwood

Question 22. The rind of Citrus fruit possesses:

1. Lysigenous glands
2. Schizogenous glands
3. Resin duct
4. Laticiferous ducts.

Answer: 1. Lysigenous glands

Question 23. The bark of a tree comprises:

1. All tissues outside the vascular cambium
2. All tissues outside the cork cambium
3. Only the cork
4. The cork and secondary tissue.

Answer: 2. All tissues outside the cork cambium

Question 24. In collateral vascular bundles:

1. Xylem is outside and Phloem is inside
2. Phloem is outside and the xylem is inside
3. The internal xylem is surrounded by phloem
4. The internal phloem is surrounded by the xylem.

Answer: 2. Phloem is outside and xylem is inside

Question 25. Which one of the following is a component of the xylem?

1. Tracheid
2. Sieve-tube
3. Companion cell
4. Phloem parenchyma.

Answer: 1. Tracheid

Question 26. One cannot find the age of a tree by its rings if that tree is located in which of the following forests?

1. Tropical deciduous
2. Tropical evergreen
3. Temperate deciduous
4. Temperate evergreen.

Answer: 2. Tropical evergreen

Question 27. The cortex of a root functions primarily in the:

1. Water absorption
2. Food storage
3. Mineral absorption
4. Mineral translocation.

Answer: 2. Food Storage

Question 28. The number of cambial strands in the vascular bundle of cucurbita is:

1. Two
2. Three
3. One
4. Four.

Answer: 1. Two

Question 29. The hypodermis of the monocot stem consists of:

1. Parenchyma
2. Chlorenchyma
3. Sclerenchyma
4. Collenchyma.

Answer: 3. Sclerenchyma

Question 30. The hypodermis of the dicot stem consists of:

1. Parenchyma
2. Chlorenchyma
3. Collenchyma
4. Sclerenchyma.

Answer: 3. Collenchyma

Question 31. The shape of the fibre cell is:

1. Rectangular
2. Elongated with tapering ends
3. Elongated with blunt ends
4. Short and oblong.

Answer: 2. Elongated with tapering ends

Question 32. Numerous vascular bundles are scattered in:

1. Monocot stem
2. Monocot root
3. Monocot leaf
4. Monocot seed.

Answer: 1. Monocot stem

Question 33. Procambium is situated just behind apical meristem” Procambium gives rise to:

1. Only vascular cambium.
2. Only cork cambium
3. Primary vascular bundles and vascular cambium
4. Only primary vascular bundle.

Answer: 3. Primary vascular bundles and vascular cambium

Question 34. Cortex is the region found between :

1. Epiderrnis and stele
2. Hypodermis and endodermis
3. Endodermis and pith
4. Endodermis and vascular bundles.

Answer: 1. Epiderrnis and stele

Question 35. One of the functions of the aerial stem is :

1. Location
2. Absorption of water
3. Absorption of water and minerals
4. Conduction of water and minerals.

Answer: 4. Conduction of water and minerals.

Question 36. The amount of secondary xylem as compared to secondary phloem formed every year is:

1. Equal
2. 8-10 times
3. Half
4. 4-5 times.

Answer: 2. 8-10 times

Question 37. Collenchyma cells have:

1. Thick non-lignified walls
2. Thick lignified end walls
3. Thin non-cutinised walls
4. Thin cutinised walls.

Answer: 1. Thick non-lignified walls

Question 38. Xylem vessels and phloem companion cells are generally absent in:

1. Lerns and angiosperms
2. Ferns and gymnosperms
3. Bryophytes and pteridophytes
4. Pteridophytes and thallophytes.

Answer: 2. Ferns and gymnosperms

Question 39. The fully developed tracheary elements are:

1. Elongated having lignified secondary walls
2. Highly suberized
3. Having dense cytoplasm
4. With a distinct nucleus.

Answer: 1. Elongated having lignified secondary walls

Question 40. Heartwood is absent even in very old trunks of:

1. Quercus and pinus
2. Sairx and more
3. Mangifeta and dalbergia
4. Populus and sales.

Answer: 4. Populus and salrx.

Question 41. The xylem fibres are classified into:

1. Protoxylem and metaxylem
2. Primary and secondary libres
3. Fibre tracheids and fibres
4. Long and short fibres.

Answer: 3. Fibre tracheids and fibres

Question 42. The stomata are sunken in:

1. Mesophytes
2. Halophytes
3. Xerophytes
4. Hydrophytes.

Answer: 3. Xerophytes

Question 43. Leaves are sites for:

1. Reproduction
2. Photosynthesis
3. Respiration
4. Both (2) and (3).

Answer: 4. Both (2) and (3).

Question 44. In an isobilateral leaf, the stomata are generally found:

1. On the upper epidermis
2. On the lower epidermis
3. On the upper and lower epidermis
4. None of the above.

Answer: 2. On the lower epidermis

Question 45. In leaves the protoxylem elements:

1. Face towards the abaxial surface
2. Face towards the adaxial surface
3. Are surrounded by metaxylem elements
4. Are scattered in the bundle.

Answer: 3. Are surrounded by metaxylem elements

Question 46. Stomata in lolus are present on:

1. Lower surface
2. Petiole
3. Upper surface
4. Both surfaces

Answer: 3. Upper surface

Question 47. Leaves fall from the branches on account of:

1. Fall in atmospheric temperature
2. Shortening of daytime
3. Formation of abscission layer external to the cork
4. Completing their duration of life.

Answer: 3. Formation of abscission layer external to the cork

Question 48. Mesophyll is formed of:

1. Xylem and phloem
2. Palisade and spongy parenchyma
3. Chlorenchyma and collenchyma
4. Chlorenchyma and sclerenchyma.

Answer: 2. Palisade and spongy parenchyma

Question 49. In a dorsiventral leaf, the protoxylem is towards:

1. Lower epidermis
2. Middle
3. Upper epidermis
4. None of the above.

Answer: 3. Upper epidermis

Question 50. The movement of carbohydrates from the leaves of the tree to the root is primarily a function of the:

1. Xylem
2. Phloem
3. Epidermis
4. Cambium.

Answer: 2. Phloem

Question 51. The maximum loss of water occurs through:

1. Stomatal transpiration
2. Foliar transpiration
3. Lenticular transpiration
4. Cuticular transpiration.

Answer: 1. Stomatal transpiration

Question 52. Stomata in potomogeton are:

1. Absent
2. Present on stem
3. Present on leaves
4. Both (2) and (3).

Answer: 1. Absent

Question 53. Isobilateral leaves are:

1. Hypostomatic
2. Epistomatic
3. Amphistomatic
4. Automatic.

Answer: 3. Amphistomatic

Question 54. Palisade tissue is present on both sides of the leaf of:

1. Helianthus
2. Nerium
3. Wheat
4. Maize.

Answer: 2. Nerium

Question 55. Grass leaves can fold and unfold because they:

1. Have bulliform cells
2. Are long and thin
3. Have parallel venation
4. Are isobilateral.

Answer: 1. Have bulliform cells