Plant Kingdom Mock Test – Class 11 Biology

1. Which statement correctly describes the use of marine algae as food?

2. A motile, flagellated reproductive cell is released by an alga and germinates directly into a new plant without gamete fusion. It is most appropriately identified as a:

3. Fucoxanthin is experimentally removed from a brown-algal pigment extract while chlorophyll a and chlorophyll c remain. The most immediate expected change is:

4. A taxonomist compares chromosome length, centromere position and chromosome behaviour during cell division. These observations are most appropriately treated as:

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

6. Study the reproductive profiles.

The profile showing the stronger precursor of seed habit is:

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

8. The same-tree reproductive condition in Pinus means that:

9. Assertion: Bryophytes are called amphibians of the plant kingdom because xylem and phloem carry water between aquatic and terrestrial phases.
Reason: Their plant bodies live on land, but external water is needed for fertilisation.

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

11. Pinus mycorrhiza and Cycas coralloid roots are similar because both:

12. Examine the developmental records.

The table is corrected by:

13. A structure is described as a small green thallus lying close to moist soil, with antheridia and archegonia on its surface. It represents:

14. Destruction of every archegonium in a pteridophyte prothallus will most directly prevent:

15. Arrange the events from formation of a liverwort sporophyte to establishment of the next gametophyte.
P. Spores germinate into free-living gametophytes.
Q. A foot-seta-capsule sporophyte develops.
R. Meiosis occurs within the capsule.
S. Haploid spores are released.

16. A haploid spore released from a bryophyte sporophyte normally develops into:

17. 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.

18. Heterospory alone is insufficient to establish a seed-habit precursor because the stronger evolutionary condition also requires:

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

20. A homosporous pteridophyte differs from a heterosporous one most directly in that the homosporous plant:

21. If diploid spore mother cells each complete meiosis normally and every meiotic product survives, the maximum number of haploid spores formed is:

22. Algal body organisation spans:

23. 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:

24. The ability of many red algae to occur at considerable depth is most closely associated with:

25. In an algal sample, two fusing gametes are unequal in size, but the larger one has not been identified as a non-motile female gamete. On the available evidence, the safest classification is:

26. A mature gymnosperm seed is described as naked because it:

27. 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:

28. In a heterosporous pteridophyte, the correct size relation is:

29. A lateral bud formed on the secondary protonema of a moss normally develops into:

30. Which relationship correctly describes the reproductive condition of angiosperms?

31. In an oogamous brown alga, fusion of the gametes may occur:

32. A computer groups plants after comparing a matrix of hundreds of equally weighted coded characters. The feature that most clearly distinguishes this analysis from an old habit-based key is:

33. Compared with an algal thallus, a bryophyte body is generally:

34. Consider the following habitat statements for Phaeophyceae.
I. Most members occur in salt water.
II. Some may occur in brackish water.
III. Freshwater occurrence is rare.
IV. The class is restricted exclusively to freshwater.

35. A moss protonema and a fern prothallus are similar in that both:

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

37. In some heterosporous pteridophytes, the female gametophyte remains associated with the parent sporophyte for variable periods. Which statement correctly explains this condition?

38. An alga contains abundant r-phycoerythrin and is collected from warm marine water. It most likely belongs to:

39. Plants P and Q look similar because both evolved thick leaves in dry habitats. New anatomical and reproductive evidence shows that P shares a recent common ancestor with Plant R rather than Q. A phylogenetic system should:

40. Arrange the stages from a mature pteridophyte sporophyte to the beginning of the gametophyte.
P. A spore germinates.
Q. Spore mother cells undergo meiosis.
R. A prothallus begins to develop.
S. Haploid spores are formed.

41. A motile reproductive cell settles on a surface and develops into a new algal thallus without fusing with another cell. It is functioning as a:

42. Following fertilisation within a retained female gametophyte of a heterosporous pteridophyte, the zygote:

43. Gymnosperm leaves may be:

44. Archegonia occur in the reproductive systems of:

45. A cone-bearing seed plant produces small microspores and large megaspores in separate sporangia borne on specialised leaves. The reproductive profile shows:

46. Examine the female reproductive records.

The record requiring correction is:

47. An unknown organism is autotrophic and wall-bearing, but its cells are prokaryotic. For placement among the major plant groups, the most defensible conclusion is that it:

48. A bryophyte gametophyte and a fern prothallus possess mature sex organs, but both surfaces remain dry. The common immediate limitation is:

49. A described bryophyte figure shows a large green plant body bearing antheridia and archegonia. The labelled body represents the:

50. An organism has a simple chlorophyll-bearing body that is not differentiated into true roots, stem and leaves. It is largely aquatic and lacks vascular tissue. Its body organisation is best described as: