Anatomy of Flowering Plants Mock Test – Class 11 Biology

1. Most cortical cells of a young root are selectively crushed, but the epiblema, endodermis and vascular tissues remain initially intact. The earliest direct disturbance is expected in:

2. A graph has bulliform-cell relative water content on the horizontal axis and inward leaf curvature on the vertical axis. The curve is highest at low relative water content and declines as bulliform-cell water content rises. The trend indicates that:

3. Two unknown sections both show epiblema, cortex, endodermis, pericycle, radial vascular tissues and exarch xylem. Section P has xylem groups and a narrow pith; section Q has xylem groups and a broad pith. Cambial activity has not yet been observed. The most defensible conclusion is:

4. Equal regions of two tissues are damaged. In tissue P, all collenchyma cells are destroyed. In tissue Q, vessel elements are destroyed, but tracheids, xylem parenchyma and xylem fibres remain intact. Which outcome is most likely?

5. Match each partial anatomical record with the strongest conclusion that can be drawn from it. A Column II entry is used once.

6. Match each tissue with the most appropriate classification and principal feature. A Column II entry is used once.

7. An unlabelled primary phloem section contains narrow sieve elements and larger sieve elements in the same strand, but no developmental series or time marker is available. Which conclusion best respects the evidence?

8. Tracheid lumens are blocked in a stem, xylem fibres are removed and xylem parenchyma remains intact. Vessel elements are unaffected. Which combined outcome is most likely during the early period after treatment?

9. Match each leaf feature with the leaf type in which it is most characteristic. A Column II entry may be reused.

10. Consider the following statements about simple permanent tissues.
I. Parenchyma is usually living and thin-walled.
II. Collenchyma is living and shows uneven wall thickening.
III. Mature sclerenchyma is generally dead and heavily lignified.
IV. All three tissues contain abundant intercellular spaces.

11. In a dorsiventral leaf with reticulate venation, the largest vascular bundle is generally associated with:

12. A coloured solution is supplied to two otherwise similar roots. In root P, the endodermal Casparian strips are intact. In root Q, those strips are disrupted without killing the endodermal cells. The colour spreads through endodermal wall regions more freely in Q. This result supports the conclusion that:

13. Stem sections P and Q are treated with a starch-detecting reagent.

The most justified interpretation is:

14. The pericycle of a young dicot root is selectively destroyed, while the endodermis and existing vascular tissues remain intact. The most likely combined consequence is:

15. Match each tissue system with the description that identifies it most accurately. A Column II entry is used once.

16. Root P has xylem groups and alternating phloem patches. Root Q has xylem groups and alternating phloem patches. A stain labels xylem patches only. What percentage of the separately counted vascular patches is labelled in each root, and what does the comparison show?

17. Use the arrangement described below. A stem section has an outer epidermis, several layers of thick-walled dead cells beneath it and a broad internal parenchymatous region without distinct cortex, medullary rays or pith. Numerous vascular bundles occur within this region. The section is most consistent with:

18. Arrange the structural events that establish a functional sieve-tube pathway.
P. Food materials move through the connected conducting pathway.
Q. Sieve-tube elements become aligned end to end.
R. Their adjoining end walls form sieve plates.
S. Successive elements become functionally continuous through sieve-plate pores.

19. Use the arrangement described below. Label P marks a group of unusually large, empty-looking cells in the upper epidermis directly above a vascular bundle. Label Q marks ordinary chloroplast-containing mesophyll beneath them. Label P identifies:

20. Match each root character with the category it most directly represents. A Column II entry is used once.

21. In a dorsiventral leaf, the abaxial surface bears many more stomata than the adaxial surface. A transparent seal closes only the abaxial stomatal pores without covering the cuticle or damaging internal tissues. Which immediate change is most likely?

22. Two supporting or conducting cell groups are compared. Group P forms a subepidermal band of living cells with uneven corner thickening. Group Q lies in xylem and consists of dead, lignified, pitted cells with tapering ends. Which structure-function pairing is accurate?

23. Consider the following statements about the epiblema and cortex of a primary dicot root.
I. The epiblema is the outermost layer and may form root hairs.
II. The cortex consists of several layers of thin-walled parenchymatous cells.
III. The cortex lies internal to the pericycle.
IV. Intercellular spaces commonly occur among cortical cells.

24. The following regions are compared in a young dicot stem.

Which interpretation is accurate?

25. A treatment selectively kills guard cells while leaving the stomatal pores, subsidiary cells and ordinary epidermal cells structurally present. The apertures no longer respond normally to changing conditions. The strongest inference is:

26. A primary surface layer consists of one continuous row of compact cells. Each cell has a large central vacuole that confines much of the cytoplasm to a thin peripheral layer. Intercellular spaces are negligible. This organisation is most consistent with:

27. Use the surface arrangement described below. Region P is a continuous outer layer. At Site Q, two specialised cells surround a pore. Structure R is a hair arising from the shoot surface. All three belong to the same tissue system. That system is:

28. A storage organ contains abundant living parenchymatous cells filled with reserve material. If these cells are selectively destroyed while vascular tissues remain intact, the earliest direct effect is expected to be:

29. A mounted grass-leaf section has lost one epidermal surface during preparation. The remaining surface bears groups of large colourless cells, and xylem in each vascular bundle faces that surface. Mesophyll is undifferentiated. The strongest conclusion is:

30. Consider the following statements.
I. Organ-specific tissues such as root cortex and leaf mesophyll can belong to the same ground tissue system.
II. Cell viability, wall pattern and position can jointly predict tissue function.
III. Vascular geometry and xylem maturation orientation are separate anatomical classifications.
IV. One diagnostic feature is always sufficient to identify any root, stem or leaf section with certainty.

31. An otherwise typical dicot-stem section loses visible starch grains from its endodermis, but still has a collenchymatous hypodermis, differentiated cortex, sclerenchymatous pericycle, medullary rays and ringed open bundles. The strongest conclusion is:

32. A young stem has a subepidermal band of living elongated cells with pectin-rich corner thickenings, but its internal ground tissue is undifferentiated and its vascular bundles are scattered and closed. Which interpretation is best?

33. Two phloem components are compared.

The most accurate interpretation is:

34. A mesophyll region consists of oval or rounded chloroplast-containing cells arranged loosely around numerous large intercellular spaces and air cavities. The region is:

35. Consider the following statements about the anatomical study of flowering plants.
I. It includes the spatial arrangement of tissues within organs.
II. It relates internal structures to functions such as transport and support.
III. It is restricted to features visible on the uncut plant surface.
IV. It can help interpret structural differences associated with adaptation.

36. Consider the following statements about shoot trichomes.
I. They are usually multicellular.
II. They may be branched or unbranched and soft or stiff.
III. Some trichomes are secretory.
IV. Every trichome has the same structure and functions mainly in soil absorption.

37. Structure P consists of semilunar sclerenchymatous patches external to phloem in a stem with ringed open bundles. Structure Q forms a complete sclerenchymatous boundary around each bundle in a stem with scattered closed bundles. P and Q are respectively:

38. Functional vascular cambium is experimentally introduced between phloem and xylem in each otherwise typical monocot-stem bundle. If the inserted cells divide normally, each altered bundle would:

39. A plant growing in seasonally dry conditions has a thick aerial cuticle, dense shoot trichomes and grass-like leaves that roll inward during water stress. These features function together mainly by:

40. Four regions of a young dicot stem are described.

Which identification is accurate?

41. Two tissues are compared.

The most accurate interpretation is:

42. Consider the following statements about conjunctive tissue in a dicot root.
I. It occurs between alternating xylem and phloem patches.
II. It is primarily parenchymatous.
III. Some of its cells contribute to later cambial organisation.
IV. It forms the outermost root layer that produces root hairs.

43. Three cell populations are observed.
P. Cells at a shoot tip repeatedly enter mitosis.
Q. Mature pith cells maintain a stable storage role.
R. Fully differentiated conducting cells perform transport.
The most appropriate classification is:

44. Vascular cambium is selectively destroyed in a young dicot stem after its primary xylem and phloem have become functional. The most likely result is:

45. Two similar aerial shoots are maintained under identical conditions. The cuticle is removed from treatment P without damaging stomata or internal tissues; treatment Q remains intact. P loses mass more rapidly over time. The best conclusion is:

46. Two root treatments produce the following results.

Which conclusion is best supported?

47. Two flowering plants possess roots, stems and leaves built from the same three broad tissue systems. One plant, growing in a drier habitat, has an aerial surface organisation that reduces water loss more effectively. The most justified interpretation is:

48. An unknown section has an epiblema, broad cortex, endodermis, pericycle, radial exarch vascular tissues, xylem groups and a large pith. The most appropriate completion is: the specimen is a ______.

49. Consider the following records from prepared sections.
I. A compact surface layer with large vacuoles and peripheral cytoplasm is labelled meristematic tissue.
II. A parenchymatous layer immediately inside a root endodermis and initiating lateral roots is labelled pericycle.
III. A sclerenchymatous ring surrounding a monocot-stem bundle is labelled vascular cambium.
IV. A living enucleate phloem element connected to a companion cell through plasmodesmata is labelled a sieve-tube element.
Which records require correction?

50. Use the arrangement described below. Surface P and surface Q both contain stomata. The tissue between them consists of similar chloroplast-bearing cells without separate palisade and spongy layers. Vascular bundles occur repeatedly across the lamina. The section is most consistent with: