Morphology of Flowering Plants Mock Test – Class 11 Biology

1. Which formula best represents a typical Malvaceae flower?

2. Four spreading structures are described below.

The correct sequence of identities is:

3. A branch arises from an underground stem portion, grows obliquely through the soil and emerges some distance from the parent as a new aerial shoot. It lacks a terminal rosette and does not creep along the surface. It is classified as:

4. Which floral combination is characteristic of Solanaceae?

5. Four leaves are compared.

The correct grouping is:

6. Filament measurements from four flowers are shown below.

The clearest evidence of unequal filament lengths occurs in:

7. A grass inflorescence has spikelets attached directly and without individual stalks along an elongated main axis. A second grass has spikelets borne on branches arising from the main axis. These inflorescences are most appropriately related as:

8. The following statements concern a typical carpel.
I. The ovary forms its enlarged basal region.
II. The style connects the ovary with the stigma.
III. Ovules are attached to placental tissue within the ovary.
IV. The stigma is the principal site of pollen production.

9. In an Australian Acacia leaf, the normal lamina becomes greatly reduced, while the petiole expands into a flattened green structure that carries out photosynthesis. This expanded petiole is a:

10. Before a developing seed separates from the fruit, its point of attachment is marked. After separation, the mark corresponds to a scar on the seed surface, while a small pore occurs nearby. The scar and pore are:

11. Match each observation with the most appropriate inference. Each Column II entry is used once.

12. The relevant positions are described below. Petal P is large and posterior. It overlaps two lateral Petals Q and R. Q and R overlap two smaller anterior petals that are partly united to form Structure S. P, Q–R and S are respectively:

13. Eye-bearing and eye-free pieces are cut from the same potato tuber and adjusted to contain equal stored food. Nodal and budless internodal pieces are also cut from one rhizome. Only the eye-bearing tuber pieces and nodal rhizome pieces produce new shoots. Which conclusion is best supported?

14. A lateral branch arches away from its parent, touches the soil, forms roots and produces a new shoot. Later, the connecting portion dies, but the daughter plant survives. Its survival is best explained by the fact that the daughter region:

15. All peripheral ray florets are experimentally removed from a young sunflower head, but the central disc florets, common receptacle and involucral bracts remain intact. Which prediction is most accurate?

16. A mustard ovary initially has ovules attached to the inner wall and one main chamber. During development, inward growths form a false septum, making the ovary appear bilocular. Which conclusion is justified?

17. Match each plant with the characteristic aestivation of its corolla. A Column II entry may be reused.

18. Three shoots have the following nodal arrangements.

The correct classification is:

19. The filament relationships in four flowers are shown below.

The correct classification is:

20. An underground axis bears scale leaves at regularly spaced nodes, distinct internodes and axillary buds. No root cap or root-hair zone occurs at its growing end. It should be identified as:

21. Review the statements concerning perigynous flowers.
I. The gynoecium lies in the central region of a cup-like thalamus.
II. Other floral whorls arise from the rim of the thalamic cup.
III. The ovary is treated as half-inferior.
IV. The thalamus completely encloses and fuses with the ovary wall.

22. The floral-member counts of three specimens are shown below.

The most appropriate classification is:

23. A damaged flower has lost most of its petals, but dissection reveals an epicalyx, five separate petal attachment scars, numerous filaments united into one tube and monothecous anthers. The ovary is superior and multilocular with axile placentation. The specimen is most likely:

24. Five petals in a flower bud are united at their bases to form a short corolla tube. Their free lobes meet edge to edge without overlapping. Which paired description is correct?

25. Use the two leaf arrangements described below. In Leaf P, deep incisions divide the margin but stop before reaching the midrib. In Leaf Q, the incisions extend to the midrib and separate the blade into distinct units. P and Q are respectively:

26. Five petals form a regular cycle in which each petal overlaps the next petal and is overlapped by the preceding one. Which additional feature must be present?

27. A specimen shows the following arrangement. Structure P is a jointed grass stem. Region Q forms a solid transverse level from which a leaf and branch may arise, while Region R extends between two successive Q regions and is commonly hollow. Q and R are respectively:

28. A specimen shows the following arrangement. Flower P occupies the terminal end of the main axis and opens first. Flowers Q and R arise later from lower lateral positions. The main axis does not extend beyond P. This inflorescence is:

29. Two plants both produce capsules.

Which conclusion is correct?

30. Aestivation refers to:

31. A maize grain and a free bean seed are compared.

Which conclusion is best supported?

32. Four modified stems show the following features.

The correct classification is:

33. Match each modified structure with its developmental origin and function. Each Column II entry is used once.

34. Branch-derived prop roots of Plant P and lower-node stilt roots of Plant Q are prevented from entering the soil, although their initiation remains normal. Which outcome is most likely?

35. Roots with intact or experimentally removed root caps are grown through either soft gel or compact soil. In soft gel, both groups elongate similarly. In compact soil, capless roots show much greater apical injury and reduced penetration. The strongest inference is:

36. Four plant organs show the following observations.

The most accurate interpretation of the complete dataset is:

37. A floral record gives the formula but labels the flower as unisexual. Which correction is required?

38. The following functions are associated with root systems.
I. Absorption of water and mineral nutrients
II. Anchorage of the plant in the soil
III. Storage of reserve food in some plants
IV. Synthesis of certain plant growth regulators

39. Assertion: Cactus spines are classified as modified leaves.
Reason: Their pointed form provides protection and their reduced surface helps limit water loss.

40. A lateral green organ develops from a leaf primordium at a stem node and differentiates into a leaf base, petiole and lamina. A mutation prevents formation of the axillary bud at that node. How should the organ itself be classified?

41. The observations from three flowers are given below.

The correct classification is:

42. A unilocular ovary contains only one ovule, but its exact attachment point is not visible in the available section. Which additional observation is most necessary before identifying the placentation as basal?

43. In a longitudinal view of a root tip, Region P covers the extreme apex, Region Q contains small actively dividing cells, Region R contains rapidly lengthening cells, and Region S bears numerous delicate root hairs. Region S is identified as:

44. A treatment selectively disables the elongation region of a root while leaving the meristematic region functional and existing root hairs temporarily intact. The most likely early result is:

45. A dissection reveals the following organisation. Structure P is an expanded green blade, Q is a stalk connecting it to the stem, R attaches the structure at a node, and S is a bud in the angle between R and the stem. The strongest evidence that P–Q–R forms one leaf is:

46. Two students prepare records of the same flowering plant.

Which evaluation is most appropriate?

47. Identical insectivorous plants are grown in nitrogen-poor soil under equal light and water. Group P receives insects, while Group Q is prevented from capturing them. Both groups remain green, but Group P shows stronger growth. The most justified inference is:

48. In Leaf P, all leaflets arise from one point at the petiole tip. In Leaf Q, leaflets arise at different positions along an elongated rachis. Experimental shortening of Q’s rachis brings its leaflets closer together but does not change their original attachment sites. Which conclusion is correct?

49. A developmental alteration divides the single filament bundle of a monadelphous flower into two stable bundles without changing stamen number or fertility. The modified androecium becomes:

50. A cultivated grass has a jointed culm, sheathing parallel-veined leaves and spikelets. Juice rich in commercially extracted sugar accumulates in its stem. Which crop–use relation is supported?