The Living World Mock Test – Class 11 Biology

1. Match each evidence pattern with the strength of support it provides for recognising a biological taxon. Column II entries may be reused.

2. Panthera leo and Panthera tigris differ at species but share Panthera, Felidae, Carnivora, Mammalia, Chordata and Animalia. Across the seven major ranks from species to kingdom, how many taxa do they share, and what is their lowest shared rank?

3. Four unknown plant genera are compared blindly with a reference profile for Solanaceae. Genera P, Q and R match of family characters, including both vegetative and reproductive features. Genus S matches only one vegetative feature and differs in all recorded reproductive characters. The most justified inference is:

4. A motile microorganism consistently moves toward a nutrient source. The nutrient gradient is then reversed while temperature and all other conditions remain constant. After detecting the change, the organism is expected to:

5. Let , and represent Anacardiaceae, Sapindales and Dicotyledonae for mango; let , and represent Poaceae, Poales and Monocotyledonae for wheat; and let represent Angiospermae. Which relation preserves both plant rows?

6. Several individuals share the same diagnostic body organisation but differ in age-related size. Another group has a consistently different arrangement of the same structures. The soundest placement decision is to:

7. A graph plots one morphological measurement for individuals from Groups P and Q. The P curve spans , and the Q curve spans , producing substantial overlap. A second recorded structure is type X in every P individual and type Y in every Q individual. The graph and structural record together indicate that:

8. 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:

9. Let represent the proportion of misidentified entries in a biological resource inventory and its reliability for planning, with sampling effort and documentation quality otherwise unchanged. Which relation is expected?

10. Potato and brinjal are distinct species placed in the genus ______ because they share a closer character relationship with one another than with species of other genera.

11. A marker begins at family in a hierarchy figure and follows two successive upward arrows. Which path does it trace?

12. Evaluate the following statements.
I. Failure to reproduce by itself proves that an individual is non-living.
II. Other integrated living properties may remain present in a sterile organism.
III. Reproduction still has an important role in biological continuity.

13. In a two-time figure, the mass of the same seedling rises from to , while the number of seedlings remains one. The figure directly represents growth as:

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

15. The classifications below are limited to class and phylum.

Bird R and Mammal S are best described as:

16. Species P and Q were initially grouped together because of superficial resemblance. Later comparative evidence showed that P shares a closer biological relationship with Species R, and the arrangement was revised. The strongest inference is:

17. 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:

18. 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.

19. The nesting of genera within two families is shown below.

The relation directly supported by the table is:

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

21. 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.

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

23. A marker in a seven-box hierarchy starts at species, follows three upward arrows and then one downward arrow. Using the order species → genus → family → order → class → phylum or division → kingdom, where does the marker finish?

24. In animal classification, the major category immediately above class is called ______.

25. A nested taxonomic arrangement has been converted into the table below.

Which interpretation uses both rows correctly?

26. A survey records distinct kinds in its original area. Expanding into an adjacent habitat adds previously unrecorded kinds and redetects already listed kinds. The new cumulative richness and percentage increase are:

27. A fungal structure contains numerous small units within a specialised sac. The units are released, disperse and each can develop into a new fungal individual without gamete fusion. The units represent:

28. Consider the following statements about self-replication in the integrated description of living systems.
I. It contributes to biological continuity through production of new organisms or systems.
II. It requires every offspring to be an exact copy of its parent.
III. A sterile individual does not invalidate self-replication as a broader property of living lineages.
IV. External deposition of material on an object is sufficient evidence of self-replication.

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

The data most strongly support the conclusion that:

30. Evaluate the following statements about taxonomic operations.
I. Nomenclature assigns an accepted scientific name under agreed rules.
II. Classification places organisms into appropriate biological categories.
III. Identification records characters without determining organismal identity.
IV. Characterisation assigns the final accepted name to the organism.

31. Consider the following statements about Panthera and Felis.
I. They represent separate genera.
II. Both are included in Felidae.
III. Their common family makes them members of one genus.
IV. Species assigned to different genera may share the same family.

32. 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.

33. Match each observation with the scale of diversity it reveals. Column II entries may be reused.

34. Four panels represent a plant cell, an animal cell, a fungal cell and a microbial cell. Each panel shows coordinated arrows for biomolecule formation, conversion and breakdown. The common property demonstrated across all four panels is:

35. Four handwritten versions of Panthera leo are described.
P. Each word has its own underline.
Q. Panthera is underlined, and leo has a separate underline of equal style.
R. Two distinct underlines appear, one beneath each word.
S. One uninterrupted underline extends beneath both words together.
The version that violates the handwritten convention is:

36. A sexually reproducing natural population occupies one continuous habitat. Repeated observations show that its adult members mate among themselves and produce fertile offspring. No stable reproductive subdivision is detected within the population. Under the biological species idea, the evidence most strongly supports:

37. Match each forestry-related activity with its taxonomic contribution. Each Column II entry is used once.

38. 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?

39. 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.

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

41. Two graphs are recorded after cell division. In Record P, tissue-cell number doubles but multicellular-organism number remains . In Record Q, free-living cell number and organism number both double. The defining difference is that:

42. A database stores the name indica Mangifera after accidentally reversing its two components. If the component identities are already known, the appropriate repair is:

43. In a vertical hierarchy, the basal box represents the narrowest major category, every upward arrow enters a broader group, and the top box represents the broadest listed category. Which pair correctly labels the two endpoints?

44. An intact unicellular organism detects a chemical change and adjusts several reaction rates together. After the cell is disrupted, its separated components retain some individual activities but no longer produce the coordinated adjustment. The case supports the inference that:

45. Two present-day taxa have character sets and . The comparison gives but . Which interpretation is valid?

46. A naming authority replaces independently invented labels with names assigned under agreed international criteria. The immediate biological outcome of this change is:

47. 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:

48. Use the arrangement described below. An original figure shows one order containing six family boxes. A revised figure retains the same order but inserts Suborder P around three families and Suborder Q around the other three. The principal improvement produced by the revised figure is that it:

49. In a cell-free extract, an enzyme continues to catalyse the symbolic conversion . This observation is best interpreted as:

50. Four families are compared using independent structural characters. Classification from one selected character changes whenever that character is replaced, whereas classification from the complete character set repeatedly groups all four families together. The strongest justified inference is: