The Living World Mock Test – Class 11 Biology

1. 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:

2. Match each taxon in the human row with its rank. Each Column II entry is used once.

3. 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.

4. Project P assigns accepted names to correctly identified specimens and enters them into ranked categories. Project Q performs the same operations and then compares the groups to infer their evolutionary relationships. The projects are best described as:

5. Equal boulders are placed in two chambers. One receives a mineral spray, while the other is shielded. Only the sprayed boulder gains mass, and the gain disappears when its coating is scraped off. No cellular organisation or chemical self-regulation is detected. The strongest inference is:

6. An agricultural survey records two visually similar grasses under one local name. Only one is the intended crop species, but their yield records are about to be combined. The most appropriate taxonomic action is to:

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

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

9. A zoological record describes two genera. Genus P includes lions, leopards and tigers, while Genus Q includes domestic cats and closely related forms. Both genera share the broader character pattern of the cat family. The family containing P and Q is:

10. 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:

11. Two sexually reproducing populations look nearly identical. Members within each population produce fertile offspring, but repeated crosses between the populations fail under suitable conditions. If both populations are merged into one species solely because of their appearance, the most likely consequence is:

12. 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:

13. 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 ______.

14. An adult mammal has reached a stable overall body size. After a superficial skin injury, normal healing begins. The most likely prediction is that:

15. 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.

16. Species P and Q belong to Genus G, while Species R and S belong to Genus H. If G and H are closely related and placed together in Family F, Family F is:

17. An arrangement shows a box labelled “Class rank.” Inside it is a named group containing organisms with a consistent insect body organisation and three pairs of jointed legs. The arrangement demonstrates that:

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. Consider the following statements about the listed classifications of man and housefly.
I. Their phyla are Chordata and Arthropoda, respectively.
II. Their classes are Mammalia and Insecta, respectively.
III. They share the order Primata.
IV. Moving downward from the broadest listed rank, their rows already diverge at phylum.

20. Purified enzymes, substrates and cofactors are combined in a tube. Several conversions normally found in cells occur, but the mixture has no cellular boundary, coordinated self-regulation or capacity to respond as an organism. The most accurate conclusion is:

21. An organised living system maintains an internal variable within range . After disturbance, the sequence is . This relation most directly represents:

22. Suppose inability to produce offspring were used as sufficient proof that a person is non-living. Applying this rule to an infertile human couple would:

23. A graph plots the proportion of bacterial cells moving away from a chemical source on the vertical axis and chemical concentration on the horizontal axis. The response rises progressively with concentration, although bacteria possess no nervous system. The strongest inference is:

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

25. A classification merges two close species after ignoring a stable morphological difference that consistently separates their members. The most likely taxonomic consequence is:

26. Assertion: Mango and wheat first diverge at class when their classifications are traced downward from their shared division, whereas man and housefly already differ at phylum in the listed table.
Reason: Mango and wheat share Angiospermae but occupy Dicotyledonae and Monocotyledonae, while man and housefly occupy Chordata and Arthropoda.

27. A newly formed structure is regarded as progeny when it develops as an independent organism and broadly ______ the parent in its basic characteristics.

28. Under controlled temperature and nutrition, a graph of reproductive response against daily light duration is low from , rises sharply from , and plateaus above . Moving animals from to of light is predicted to:

29. A classification trial compares four candidate genera with a Solanaceae reference.

The candidate receiving the strongest experimental support for placement is:

30. Species X is placed in Genus G. Genus G belongs to Family F, which belongs successively to Order O, Class C, Phylum H and Kingdom K. Which conclusion necessarily follows?

31. Assertion: A crystal that enlarges through continued deposition of material on its surface possesses self-sustained metabolism.
Reason: Metabolism consists of coordinated chemical reactions operating within cellular organisation rather than a measurable increase in size alone.

32. Let , , , , , and represent species, genus, family, order, class, phylum or division, and kingdom, respectively. Which relation correctly represents their nesting?

33. Which sequence correctly reconstructs the classification of mango from species to division?

34. An organism is placed in Category P using an incomplete character record. Later comparison reveals a decisive set of characters matching Category Q instead. The most appropriate consequence is to:

35. The common-organism table lists species, genus, family, order, class and phylum or division. Consider the following statements.
I. Mango and wheat share exactly of these listed taxa.
II. Man and housefly share of these listed taxa.
III. Mango and man share exactly of these listed taxa.

36. 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:

37. 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.

38. The observations below were obtained from three equal-area communities.

Which interpretation best reflects the introductory meaning of biodiversity?

39. An organism is initially placed with Taxon P from external appearance. Later studies consistently show that its internal organisation and cell structure agree with Taxon Q and conflict with P. If the new observations are reliable, the classification should:

40. Six boxes form the wheat classification path from species to division. A marker starts at Triticum, moves one box upward to family and then two more boxes upward. Which sequence of visited taxa is correct?

41. Match each taxon with the kingdom in which it is placed. Column II entries may be reused.

42. 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:

43. Overall body size is plotted against age. Curve P for a perennial plant continues to rise throughout the observed lifespan. Curve Q for an animal rises rapidly early in life and then approaches a plateau. The graph is best interpreted as showing that:

44. Two databases refer to the same identified organism. Database P displays both words of its binomial in printed italics. Database Q stores the same words, order and capitalisation in plain text because styling is unavailable. The best conclusion is:

45. Two teams receive identical preserved specimens but only the description “small green organism with a spotted surface.” They assign different accepted names. After detailed structural characters are supplied, both select the same identity. The result most strongly indicates that:

46. Consider the following statements.
I. Reproduction contributes to continuity of a population or lineage.
II. Every living individual must personally produce progeny.
III. Sterile individuals can retain metabolism, organisation and responsiveness.
IV. Reproduction is characteristic of life but is not universally defining for each individual.

47. Ernst Mayr is most closely associated with which contribution to biological classification and evolutionary study?

48. 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:

49. A clay model doubles in size as a machine repeatedly adds thin layers to its surface. Evidence that would change the interpretation from accretion to biological growth would be the discovery that the increase:

50. Use the arrangement described below. A vertical series contains three time levels. The lowest level represents earlier life forms, the middle level represents later forms, and the highest level represents present organisms. A basic structural pattern persists through all three levels, although some specialised features change. The arrangement most directly represents: