The Living World Mock Test – Class 11 Biology

1. Let denote the taxon dogs, the taxon mammals and the taxon animals. The relation that best represents their nesting is:

2. Match each species-related situation with the principle it illustrates. Each Column II entry is used once.

3. Connect each stage of a biological resource inventory with its immediate result. Each Column II entry is used once.

4. A graph uses vertical position for the base and for the top of a hierarchy. The labels are species at , genus at , family at , a blank at , class at , phylum or division at , and kingdom at . The missing rank is:

5. Arrange the stages that connect a biodiversity survey with practical biological-resource planning.
P. Survey habitats and collect representative records.
Q. Describe the relevant characters of each specimen.
R. Identify the organisms and apply accepted names.
S. Organise the verified records within a classification-based inventory.
T. Use the inventory to guide a resource application.

6. Let denote the set of known and described extant species and the set of all extant species, whether described or not. The relation most consistent with the stated estimate is:

7. Two small regions labelled P and Q lie within a larger comparative figure. P contains individuals , which share all fundamental characters but vary in size. Q contains , which also resemble one another, while every Q individual differs consistently from every P individual in two diagnostic structures. The arrangement supports:

8. The trends expected while moving downward through four ranks are summarised below.

Which conclusion is supported by the complete table?

9. Match each environmental cue with the plant response that most directly demonstrates sensitivity to it. Each Column II entry is used once.

10. A worker sorts organisms using visible differences in body covering, appendages and general form. This activity represents:

11. In a dark enclosure with unchanged airflow, an animal moves toward a food odour. When the odour source is shifted to the opposite side, the animal changes direction after a short delay. The observation most strongly indicates that the animal:

12. Six internal structural characters are compared between an unknown specimen and two candidate taxa. The specimen matches Taxon P in characters and Taxon Q in . The corresponding agreement percentages and inference are:

13. Response magnitude is plotted against environmental-stimulus intensity. The response rises as stimulus intensity increases and returns toward its earlier level after the stimulus is removed. This pattern most strongly identifies the organism as:

14. The number of parents involved is ______ for deciding whether production of new progeny represents reproduction, since sexual and asexual routes differ in parent number.

15. Two groups examine replicate specimens. Group P records relevant characters, determines identity, assigns hierarchical placement and then applies the accepted name. Group Q begins with a familiar name and records only features that appear to support it. Independent reviewers agree consistently with P but frequently reject Q’s conclusions. The results support:

16. The following records compare two biological systems over the same interval.

The seedling's percentage mass increase and the culture's fold increase in individual number are, respectively:

17. Panthera and Felis are names of two separate ______, even though the organisms placed within them may share broader cat-like characters.

18. An unknown plant differs in leaf size from three Solanaceae genera but shares their fundamental floral organisation and fruit characters. The reproductive evidence most directly suggests that:

19. A lateral projection on Hydra enlarges, develops the structures needed for independent life and later separates. This organism–process relationship represents:

20. Inside a cell, an arrangement shows , , and . The complete arrangement represents:

21. Match each entry with its role in binomial nomenclature. Each Column II entry is used once.

22. Equal seedlings are grown under identical conditions, one per pot. Mean dry mass is measured at the start and after several days, while the number of seedlings in every pot remains unchanged. A significant rise in dry mass most strongly supports the inference that:

23. A specimen investigation produces the following record.

The error revealed by the complete record arose most directly because:

24. Two mass-versus-time curves rise for equal intervals. At time , loose external material is removed. A sand mound returns to its initial mass, whereas a seedling remains heavier than at the start. The difference most strongly indicates that:

25. Two research summaries are compared.
P. Species are treated only as labels in an alphabetical list, with no investigation of population relationships.
Q. Natural populations are tested for interbreeding, reproductive isolation and their role in evolutionary divergence.
Which evaluation best reflects Ernst Mayr’s contribution?

26. A validated catalogue contains known and described species. After additional distinct species are verified and added without duplication, the new catalogue total and its relation to the stated estimate are:

27. An area studied repeatedly for decades is surveyed again using careful organismal comparison. A distinct form not present in earlier records is identified. The most defensible conclusion is:

28. A project surveys a forest, records unfamiliar forms and compares each specimen with established descriptions. One specimen is recognised as a previously known species before its broader relationships are investigated. Recognition of what that specimen is represents:

29. Let denote the set of ranked categories in a hierarchy, and let denote Felidae. Which symbolic statement correctly relates the taxon, its rank and the hierarchy?

30. A graph plots orientation angle of a motile unicellular organism on the vertical axis and time on the horizontal axis. At , a directional light source is switched on, after which orientation angle changes steadily toward the source. In this record:

31. A culture begins with one unicellular organism. After each complete division, every cell has separated before the next round begins. The ordered cell counts after three successive rounds are:

32. An unknown organism U and two candidate taxa have the character sets , and . The relation that best supports placement is:

33. An audit finds that one local name has been applied to two distinct organisms, while one of those organisms appears under three regional names. After accepted standard names replace the local labels, the records become unambiguous. The audit most strongly supports:

34. Match each comparison with the kind of evidence it provides. Column II entries may be reused.

35. Use the observations below to identify the record that most strongly demonstrates biological sensing and response rather than passive physical change.

36. Match each comparison with the type of similarity it represents. Column II entries may be reused.

37. Arrange the operations in a defensible taxonomic sequence.
P. Record and compare the organism’s characters.
Q. Determine the organism’s identity.
R. Place the organism in appropriate categories.
S. Attach the accepted scientific name.

38. Arrange the following descriptions from the narrowest task to the broadest biological study.
P. Assigning an accepted scientific name
Q. Characterising, identifying, classifying and naming organisms
R. Performing the operations in Q while also interpreting evolutionary relationships

39. Two survey teams exchange specimen requests. When only the local label “marsh flower” is used, one team sends a different organism from the one intended. Repeating the exchange with the same accepted scientific designation yields the intended organism. The result supports:

40. Two genetically comparable groups of a seasonal breeder receive identical food and temperature for weeks. Group P receives of light daily, while Group Q receives . More animals enter reproductive condition in Q. The strongest justified inference is:

41. A time-lapse record of one unicellular organism shows that enlargement is completed before duplication of the essential cellular contents needed for division. Arrange the recorded events from preparation for division to the resulting increase in population.
P. Two viable daughter cells become separate individuals
Q. Essential cellular contents are duplicated
R. The original cell completes the observed enlargement
S. Division partitions the prepared cellular material
T. Population size increases

42. In a seven-level hierarchy figure, upward arrows end at a blank box located immediately above phylum or division. The missing label is ______.

43. Sterile worker bees perform organised activities, obtain energy, maintain their bodies and respond to colony signals. Their existence demonstrates that:

44. A branching arrangement begins with one box labelled Genus G. It divides into three terminal boxes labelled Species P, Species Q and Species R. A fourth terminal, Species S, arises from a different box labelled Genus H. The arrangement shows that:

45. Lion, leopard and tiger are placed together in Panthera. This placement indicates that:

46. A forest-only survey records distinct kinds of organisms. After adding a lake and a hot-spring site, the cumulative total becomes . How many additional kinds were recorded, and what is the best biological interpretation?

47. Consider the following statements about a handwritten binomial.
I. The generic name and specific epithet are underlined separately.
II. One continuous underline beneath both words is equally acceptable.
III. Separate underlining serves as the handwritten convention for the two words.

48. A zoologist has established the identity of a newly studied animal and now needs the internationally accepted framework for assigning its name. The relevant criteria belong to ______.

49. Assertion: A metabolic reaction can continue in a cell-free preparation after the required enzyme and reactants are removed from an organism.
Reason: The catalytic capacity of the enzyme may persist outside the cell when suitable physical and chemical conditions are maintained.

50. Across bacteria, fungi, plants and animals, the common structural condition that completes the statement “living organisms possess ______” is: