The Living World Mock Test – Class 11 Biology

1. Assertion: Biological investigation of what is living relies on observable and testable properties.
Reason: Testable evidence allows independent examination of a claim, unlike statements about the ultimate purpose of life.

2. An editor accidentally exchanges Anacardiaceae and Poaceae between the mango and wheat rows but leaves every other entry unchanged. What is the most likely result?

3. Biology is most accurately described as the scientific study of:

4. Species X belongs to Family P and Species Y belongs to Family Q. Their families are distinct, but both are included in Order O. If no lower rank is shared, their lowest common taxonomic rank is:

5. Let a binomial be represented as , where is the first component and is the second. If denotes the generic name and the specific epithet, the valid relation is:

6. An adult tissue initially contains cells. During one interval, damaged cells are lost and exactly new cells are formed, while body mass remains unchanged. The record indicates:

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

8. 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.

9. Arrange the events through which a temperature change can produce a plant response.
P. A measurable alteration in growth or physiology appears.
Q. Plant cells detect the changed temperature condition.
R. The surrounding temperature changes.
S. Coordinated cellular processes are adjusted.

10. An organism produces a new individual that develops separately and resembles the parent in its basic features. This event is best identified as:

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

12. Reports of organisms from cold mountains, dense forests, oceans, freshwater lakes, deserts and hot springs together most strongly demonstrate that:

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

14. Three labels are available for constructing a biological name.
P. Generic name
Q. Specific epithet
R. Author citation
The two components that constitute the binomial occur in the order:

15. Assertion: Systema Naturae is appropriately associated with the historical idea of arranging natural organisms systematically.
Reason: Linnaeus used the title Systema Naturae for his organised treatment of natural organisms.

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

17. Consider the following statements about taxonomy and systematics.
I. Both involve identification of organisms.
II. Both include nomenclature and classification.
III. Only taxonomy explicitly examines evolutionary relationships.
IV. Systematics extends the shared operations into the study of organismal relationships.

18. 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:

19. Field workers in two regions use different familiar words for specimens later confirmed to belong to the same organism. The difference represents ______ rather than evidence of two biological kinds.

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

21. A hierarchy is described as two parallel vertical paths. The animal path reads species, genus, family, order, class, phylum and kingdom. The plant path reads species, genus, family, order, class, phylum and kingdom. Which correction is required in the plant path?

22. In the statement “Mammalia occupies the rank of class,” Mammalia represents:

23. Let and denote the breadth of a genus and its containing family, while and denote average shared-character similarity within those ranks. Which relation is expected?

24. Assign consecutive position numbers from the highest rank downward as follows: kingdom , phylum or division , class , and continue the same pattern. The rank immediately below class and its position number are:

25. Consider the following statements about classification.
I. It arranges a large variety of organisms into manageable groups.
II. It supports comparison by bringing organisms with associated characters together.
III. It is identical to assigning a universally accepted name.
IV. Every convenient category must represent the same taxonomic rank.

26. Consider the following statements about the scope of biological study.
I. Describing life forms reveals the diversity and organisation of organisms.
II. Studying living processes explains how organisms function and persist.
III. Either organism description or process study alone gives a complete account of the living world.

27. When an inquiry asks, “What ultimate purpose should life serve?”, it is primarily a ______ inquiry rather than a testable biological one.

28. Assertion: The row Mangifera indica → Triticum → Anacardiaceae → Sapindales → Dicotyledonae → Angiospermae cannot represent one internally consistent classification.
Reason: The generic component of Mangifera indica is Mangifera, not Triticum.

29. Two coded animal groups are examined using the same structural method. Group P has a dorsal hollow neural system and other broad chordate characters. Group Q has a ventral solid neural cord and lacks the stated chordate character combination. The result most strongly supports:

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

31. 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:

32. Let indicate intact cellular organisation and indicate integrated living function. A treatment changes while most component molecules remain present, and observation shows . The relation best supported under these conditions is:

33. Arrange the steps for forming a binomial after an organism has been identified.
P. Determine the genus to which the organism belongs.
Q. Select the corresponding generic name.
R. Select the appropriate specific epithet.
S. Write the generic name followed by the specific epithet.

34. Use the arrangement described below. A large box labelled Family F contains three separate boxes labelled Genus P, Genus Q and Genus R. Each genus box contains several distinct species boxes. This arrangement disproves the claim that:

35. Arrange the events by which fragmentation can produce a new organism.
P. The parental body separates into viable pieces.
Q. Cells within a fragment grow and divide.
R. A fragment becomes physically independent.
S. Missing organisation is completed in the growing fragment.

36. Assertion: Membership in Carnivora does not require Felidae and Canidae to be combined into one family.
Reason: An order is broader than a family and may contain related families whose members share fewer characters than members within one family.

37. Assertion: Human self-consciousness is a special expression beyond basic awareness of environmental stimuli.
Reason: Humans can be aware of themselves and their internal mental states in addition to responding to surroundings.

38. Assertion: Reclassification may be justified when a character once considered variable is shown to be stable and diagnostic.
Reason: Individuals belonging to the same kind may differ in age-related body size.

39. A lost museum label for a domestic dog is reconstructed by comparing its aggregate character profile with three mammalian families.

The best-supported family placement is:

40. Let represent a genus, a subfamily and the family containing both. Which relation inserts the subcategory without reversing the hierarchy?

41. Two colour forms of a sexually reproducing animal look consistently different. Further study shows that members of the two forms mate freely in the natural population and repeatedly produce fertile offspring. If no other isolating evidence appears, the biological species idea predicts that the forms should:

42. The mass of a sand mound is recorded against time. Its mass rises steadily while wind deposits grains and becomes constant immediately after deposition stops. Cross-sections show that newly supplied grains remain on the outer surface. This pattern represents:

43. An unknown carnivoran was provisionally placed in Felidae from its general body form. Later, a reproducible combination of skull, dentition and limb characters agreed strongly with Canidae and conflicted with the Felidae profile. The classification should now:

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

45. Consider the five ranks above species in the listed mango and wheat rows: genus, family, order, class and division. How many of these ranks contain the same taxon in both rows, and what fraction of the five does this represent?

46. Connect each housefly taxon with the taxon that contains it immediately above. Each Column II entry is used once.

47. A fully described arrangement shows several present-day organism groups at the top. Beneath them are successive earlier records sharing portions of the same basic organisation. Lines connect each present group with earlier records, but the specialised features at the ends of the lines differ. The most appropriate interpretation is:

48. An animal possesses a notochord and a dorsal hollow neural system but lacks the character combination used to place organisms in Mammalia. The most defensible prediction is that it:

49. Root growth is recorded in identical split containers while light, temperature and soil composition remain constant.

The data most strongly support the conclusion that:

50. A mule feeds, grows, maintains cellular metabolism and responds to environmental changes but is normally sterile. The most defensible conclusion is that: