Plant Kingdom Mock Test – Class 11 Biology

1. Consider the following figure-based relations.
I. Selaginella is shown with true roots, stem and leaves.
II. Equisetum possesses nodes, internodes and a terminal strobilus.
III. A fern frond represents the dominant gametophyte.
IV. Salvinia belongs to the pteridophyte comparison set.

2. Early artificial systems commonly grouped plants by readily visible features. A character set most typical of such a system is:

3. A microscope view shows a spiral chloroplast containing several dense bodies. Chemical testing detects starch and protein in those bodies. They are most appropriately identified as:

4. Arrange the structures from the larger supporting unit to the reproductive cells produced within it.
P. Spore mother cell
Q. Sporophyll
R. Haploid spores
S. Sporangium

5. Angiosperms contribute directly to human needs by providing:

6. Four brown-algal specimens range from a small branched filament to kelps measuring , and . The data best illustrate:

7. A gymnosperm receives abundant pollen at its ovules during a dry period. Fertilisation can still proceed because:

8. A marine photosynthetic organism forms an enormous multicellular thallus rather than a microscopic cell or short filament. This observation is most consistent with:

9. The recorded male-cone profile is shown below.

The final entry should be replaced by:

10. Algin and carrageen are commercially useful mainly in relation to their ability to:

11. Pteridophytes represent the first terrestrial plant group in this sequence to possess:

12. A cell section is described from outside inward as algin coating, cellulose-containing wall, living cell contents and a large central vacuole. The structure enclosing the vacuole and containing plastids and a nucleus is:

13. Arrange the events of zoospore-mediated algal reproduction in their biologically logical order.
P. A new algal plant develops.
Q. Zoospores are formed in a reproductive structure.
R. A released zoospore germinates.
S. Motile zoospores are liberated.

14. A female gametophyte remains multicellular but develops entirely within an ovule retained on the parent plant. This arrangement is characteristic of:

15. Match each observation with its character category. A Column II entry is used once.

16. A simple green thallus grows as a film over damp soil and decaying moist wood. The location alone:

17. Assertion: Production of microspores and megaspores alone means that a pteridophyte has formed true seeds.
Reason: Heterospory creates separate male and female gametophytic pathways.

18. Arrange the features in a logical progression toward the seed-habit precursor.
P. A young embryo develops within the female gametophyte.
Q. Microspores and megaspores are produced.
R. Sex-specific gametophytes develop.
S. The female gametophyte remains associated with the parent sporophyte.

19. Samples of chlorophyll-bearing thalli are collected from a freshwater pond, coastal seawater and a continuously moist stone. The observations support the conclusion that algal habitats:

20. Four pteridophyte figures are described.
P. Small leaves and a terminal strobilus; heterosporous.
Q. Jointed stem with nodes, internodes and a terminal strobilus.
R. Large fronds bearing sporangia.
S. Floating aquatic plant; heterosporous.
The correct identification is:

21. The roots of Pinus commonly form a mutually beneficial association with:

22. A reproductive structure contains pollen-producing organs and an ovary enclosing several ovules. It is most accurately identified as:

23. An unknown gymnosperm has swollen, coral-like roots containing photosynthetic prokaryotes. The plant is most likely:

24. Two species share similar floral organisation and several internal features but differ markedly in leaf shape. A key separates them solely by that leaf difference. The main biological weakness of the key is:

25. Arrange the events beginning with the megaspore mother cell inside a gymnosperm ovule.
P. One retained megaspore develops further.
Q. Four haploid megaspores are formed.
R. The megaspore mother cell undergoes meiosis.
S. A multicellular female gametophyte develops.

26. Sunken stomata conserve water because they:

27. A data set contains chromosome counts, centromere positions and records of chromosome separation during division. The method most specifically suited to this evidence is:

28. A mature fern sporophyte survives a dry season, but its spores fail to establish prothalli and no surface water is present during the reproductive period. Population renewal will be limited mainly by:

29. A reproductive leaf carries exposed ovules but no microsporangia. It is most appropriately identified as a:

30. A conifer leaf shows a narrow needle form, thick cuticle and sunken stomata. The combined advantage is:

31. Agar used in microbial culture media and in products such as ice-creams and jellies is obtained chiefly from:

32. Compared with the liverwort sporophyte, the moss sporophyte is generally:

33. A pollen tube reaches an archegonium and releases male gametes nearby, but fusion with the egg does not occur. The most accurate conclusion is:

34. A leaf-like structure bears one or more sporangia on a pteridophyte sporophyte. It is called a:

35. The universal ploidy relation for alternation of generations is:

36. A brown-algal figure labels three regions.
Region P fixes the thallus to rock.
Region Q forms a stalk-like connection.
Region R forms the broad photosynthetic portion.
P, Q and R are:

37. Two plant populations have nearly identical vegetative morphology. One population nevertheless has a distinct chromosome complement and a consistently different profile of chemical constituents. The strongest classification decision is to:

38. Which combination provides the strongest evidence of a true seed habit rather than heterospory alone?

39. Consider the following statements about reproductive water dependence.
I. Many algae release motile cells into water.
II. Bryophyte antherozoids require external water to reach archegonia.
III. Pteridophyte fertilisation commonly requires a water film.
IV. Gymnosperm pollen tubes reduce the need for free-swimming male-gamete transfer.

40. A learner states, “Every heterosporous plant is automatically a seed plant.” The statement is incorrect because:

41. A brown-algal protoplast is expected to contain:

42. Vegetative reproduction in mosses commonly occurs through:

43. The generation relationship characteristic of a typical pteridophyte is:

44. A specimen forms long thread-like rows of cells without developing true roots, stem or leaves. The body form is characteristic of:

45. Plants P and Q share a nearly identical growth habit. Chromosome evidence and chemical profiles, however, consistently place P with Plant R. The best conclusion is:

46. Match each evidence source with the observation it most directly supplies. A Column II entry is used once.

47. A heterosporous pteridophyte retains its female gametophyte, but it lacks a true ovule and pollen-tube delivery. Compared with a gymnosperm, it has:

48. The statement “Cycas root cells directly fix atmospheric ” is inaccurate because nitrogen fixation is carried out mainly by:

49. A current removes the holdfast from a kelp while leaving much of the stipe and frond undamaged. The earliest likely consequence is:

50. Study the pigment records below.

The Rhodophyceae entry should be corrected to: