Biological Classification Mock Test – Class 11 Biology

1. Samples from three sites give the following observations.

The strongest conclusion is that:

2. Damage to sensory receptors while motor structures remain intact would most directly reduce an animal's ability to:

3. Diatoms are regarded as chief producers in oceans because they:

4. A fungal filament normally has partitions at repeated intervals. If these septa fail to form while nuclear division continues, the filament would tend toward:

5. Bacterial abundance across ordinary and extreme habitats is best related to their:

6. An organism is multicellular and heterotrophic but has cellulose-rich walls and lacks ingestive feeding. The evidence is insufficient for Animalia mainly because:

7. A cellulose-rich cell wall is most consistently associated with the general kingdom profile of:

8. In a typical ascomycete, conidia are produced:

9. Ustilago is best matched with the basidiomycete category of:

10. A bacterial population obtains preformed organic compounds from decaying leaves. Its nutritional category is:

11. Three infectious samples are analysed. In P, an infective nucleic acid is normally enclosed by a protein coat. Q remains infectious as free low-molecular-weight RNA without a protein coat. R contains no nucleic acid, and its infectivity is associated with an abnormal protein. Which identification is correct?

12. A methane-producing prokaryote is detected in waterlogged marsh sediment with little available oxygen. It most likely belongs to:

13. Healthy plants receive sap from diseased plants and later develop leaf curling and mosaic patterns. A control group receiving healthy sap remains normal. The strongest conclusion is:

14. Arrange the following events in chemosynthetic autotrophy.
P. An inorganic substance is oxidised.
Q. Energy is released.
R. ATP becomes available for cellular work.
S. Organic food is synthesised from inorganic raw materials.

15. A proposed sixth kingdom contains only viruses. The main reason this does not match Whittaker's normal five-kingdom placement is that viruses are:

16. An ascomycete is isolated from animal dung and obtains nutrients from that substrate. Its nutritional description is:

17. The presence of insectivory or parasitism in certain plants supports which classification principle?

18. A higher animal has functioning muscles but defective neuromotor coordination. The most likely result is:

19. For an individual virus, the genetic material is:

20. Basidiospores differ from ascospores most directly in their position of formation because basidiospores are:

21. Placing both a unicellular eukaryote and a large multicellular plant in Plantae overlooks a major difference in:

22. An unknown organism is multicellular, eukaryotic, photosynthetic, and possesses cellulose-rich walls. Which evidence most clearly separates it from a photosynthetic cyanobacterium?

23. In a lichen, the fungal mode of obtaining organic food is best described as:

24. A filamentous cyanobacterium lacks functional heterocysts but retains normal photosynthetic cells. The process most directly reduced is:

25. The genetic material most characteristically associated with bacteriophages in the stated comparison is:

26. Match each fungal nutritional association with the most appropriate description. A Column II entry is used once.

27. Plasmodium is distinguished from a slime-mould plasmodium by the fact that Plasmodium is:

28. Consider the following limitations of the two-kingdom system.
I. It did not separate prokaryotes from eukaryotes.
II. It did not separate unicellular forms from multicellular forms.
III. It clearly separated fungi from green plants.
IV. It satisfactorily placed every organism with mixed characters.

29. A motile eubacterium loses the function of its flagellum while its wall and metabolic machinery remain intact. The most immediate expected change is:

30. A filter retains all ordinary bacterial cells from diseased plant sap, but the filtrate remains infectious. This result most directly weakens the hypothesis that:

31. A multicellular organism has eukaryotic cells without walls and obtains food by ingestion. The combined evidence most strongly supports placement in:

32. Numerous short surface projections act in a coordinated manner to propel an aquatic protozoan. These structures are:

33. A cellulose-walled photosynthetic organism must be distinguished from a chitin-walled absorptive organism. The additional criterion that most directly uses the wall evidence is:

34. Two classification systems are compared below.

The stronger inference from the comparison is that:

35. The fungal cell wall is composed mainly of:

36. Four bacterial isolates show the following characteristics.

The pair that shares autotrophic carbon acquisition but differs in energy source is:

37. Basidia are normally arranged within the larger reproductive structure called a:

38. Fungi have been detected in air, water, soil, decaying material, and on living organisms. This distribution most strongly indicates that fungi:

39. A marine unicellular heterotroph is enclosed by a silica shell, but extensions of the cell project through openings and surround prey. It is best classified as:

40. Most euglenoids are commonly found in:

41. A mushroom, a spreading bread mould, and a single yeast cell differ visibly, yet all can be placed in Fungi. This placement shows that:

42. Mycoplasma should not be regarded as uniformly harmless since members of the group may:

43. A fungus secretes enzymes onto a dead log and absorbs the soluble products released from it. Its nutritional role is:

44. An archaebacterium isolated from an environment with extremely high salt concentration is most appropriately identified as a:

45. A bacterial diagram labels P on a spherical cell and Q on a resistant structure formed within a different bacterial cell. Which interpretation respects the information supplied by both labels?

46. The feature that most directly separates a typical animal cell from typical plant and fungal cells is:

47. In a phycomycete, two fusing gametes are morphologically similar in size and form. This sexual condition is described as:

48. A cyanobacterial population may occur as single cells, colonies, or filaments. This observation demonstrates variation in:

49. A methane-producing prokaryote is isolated from both marsh sediment and a ruminant gut. The shared metabolic evidence supports its placement among:

50. In higher animals, sensory and neuromotor mechanisms work together mainly to: