1000+ The Living World MCQ for UPSC CSE [Solved]
Thursday 9th of March 2023
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1. Which of the following statement(s) is/are correct?
A. Only living organisms grow.
B. Plants grow only up to a certain age.
C. The growth in living organisms is from inside.
D. All of the above
Answer : C
A. Only living organisms grow.
B. Plants grow only up to a certain age.
C. The growth in living organisms is from inside.
D. All of the above
Answer : C
2. Which one of the taxonomic aids can give comprehensive account of complete compiled information of any one genus or family at a particular time?
A. Taxonomic key
B. Flora
C. Herbarium
D. Monograph
Answer : D
A. Taxonomic key
B. Flora
C. Herbarium
D. Monograph
Answer : D
3. Cell division occurs _______ in plants and _______ in animals.
A. continuously, only upto a certain age
B. only upto a certain age, continuously
C. continuously, never
D. once, twice
Answer : A
A. continuously, only upto a certain age
B. only upto a certain age, continuously
C. continuously, never
D. once, twice
Answer : A
4. Genus represents
A. an individual plant or animal.
B. a collection of plants or animals.
C. group of closely related species of plants or animals.
D. none of the above.
Answer : C
A. an individual plant or animal.
B. a collection of plants or animals.
C. group of closely related species of plants or animals.
D. none of the above.
Answer : C
5. Which of the following factors exclusively affects reproduction in seasonal breeders, both plants and animals?
A. Water
B. Temperature
C. Photoperiod
D. All of these
Answer : C
A. Water
B. Temperature
C. Photoperiod
D. All of these
Answer : C
6. Which of the following taxonomic aid provides information for the identification of names of species found in an area?
A. Monograph
B. Manual
C. Flora
D. Periodical
Answer : B
A. Monograph
B. Manual
C. Flora
D. Periodical
Answer : B
7. Which of the following statements regarding nomenclature is correct?
A. Generic name always begins with capital letter whereas specific name with small letter.
B. Scientific name should be printed in italics.
C. Scientific name when typed or handwritten should be underlined.
D. All of the above
Answer : D
A. Generic name always begins with capital letter whereas specific name with small letter.
B. Scientific name should be printed in italics.
C. Scientific name when typed or handwritten should be underlined.
D. All of the above
Answer : D
8. Two animals which are the members of the same order must also be the members of the same __________.
A. class
B. family
C. genus
D. species
Answer : A
A. class
B. family
C. genus
D. species
Answer : A
9. Which one of the following is not a correct statement?
A. Botanical gardens have collection of living plants for reference.
B. A museum has collection of photographs of plants and animals.
C. Key is a taxonomic aid for identification of specimens.
D. Herbarium is a store house that contains dried, pressed and preserved plant specimens.
Answer : B
A. Botanical gardens have collection of living plants for reference.
B. A museum has collection of photographs of plants and animals.
C. Key is a taxonomic aid for identification of specimens.
D. Herbarium is a store house that contains dried, pressed and preserved plant specimens.
Answer : B
10. X being a higher category is the assemblage of families which exhibit a few Y characters. The Z characters are less in a number as compared to different genera included in a family. Identify X, Y, and Z.
A. X - Order; Y - Similar; Z - Similar
B. X - Genus; Y - Similar; Z - Different
C. X - Species; Y - Different; Z - Similar
D. X - Class; Y - Different; Z - Different
Answer : A
A. X - Order; Y - Similar; Z - Similar
B. X - Genus; Y - Similar; Z - Different
C. X - Species; Y - Different; Z - Similar
D. X - Class; Y - Different; Z - Different
Answer : A
11. Which of the following statements are correct about herbarium?
A. It is a store house of collected plant specimens that are dried and preserved on sheets.
B. Herbarium sheets contain information about date and place of collection, names, family, collectors name, etc.
C. It serves as quick referral systems in taxonomical studies.
D. All of the above
Answer : D
A. It is a store house of collected plant specimens that are dried and preserved on sheets.
B. Herbarium sheets contain information about date and place of collection, names, family, collectors name, etc.
C. It serves as quick referral systems in taxonomical studies.
D. All of the above
Answer : D
12. In printed scientific names, only the ______ is capitalized.
A. class
B. species
C. genus
D. family
Answer : C
A. class
B. species
C. genus
D. family
Answer : C
13. Which of the following is not a characteristic of life?
A. Reproduction
B. Complex chemical organization
C. Adaptation to environmental changes
D. Differentiation from cells to tissues
Answer : D
A. Reproduction
B. Complex chemical organization
C. Adaptation to environmental changes
D. Differentiation from cells to tissues
Answer : D
14. Two plants can be conclusively said to belong to the same species if they
A. have same number of chromosomes.
B. can reproduce freely with each other and form seeds.
C. have more than 90 per cent similar genes.
D. look similar and possess identical secondary metabolites.
Answer : B
A. have same number of chromosomes.
B. can reproduce freely with each other and form seeds.
C. have more than 90 per cent similar genes.
D. look similar and possess identical secondary metabolites.
Answer : B
15. The fungi, the filamentous algae, the protonema of mosses, all easily multiply by _____.
A. budding
B. fission
C. regeneration
D. fragmentation
Answer : D
A. budding
B. fission
C. regeneration
D. fragmentation
Answer : D
16. One of the most important functions of botanical gardens is that
A. they provide a beautiful area for recreation.
B. one can observe tropical plants there.
C. they allow ex-situ conservation of germ plasm.
D. they provide the natural habitat for wildlife.
Answer : C
A. they provide a beautiful area for recreation.
B. one can observe tropical plants there.
C. they allow ex-situ conservation of germ plasm.
D. they provide the natural habitat for wildlife.
Answer : C
17. Which of the following statements are not correct ?
(i) Lower the taxon, more are the characteristics that the members within the taxon share.
(ii) Order is the assemblage of genera which exhibit a few similar characters.
(iii) Cat and dog are included in the same family Felidae.
(iv) Binomial nomenclature was introduced by Carolus Linnaeus.
A. (i), (ii) and (iii)
B. (ii), (iii) and (iv)
C. (i) and (iv)
D. (ii) and (iii)
Answer : D
(i) Lower the taxon, more are the characteristics that the members within the taxon share.
(ii) Order is the assemblage of genera which exhibit a few similar characters.
(iii) Cat and dog are included in the same family Felidae.
(iv) Binomial nomenclature was introduced by Carolus Linnaeus.
A. (i), (ii) and (iii)
B. (ii), (iii) and (iv)
C. (i) and (iv)
D. (ii) and (iii)
Answer : D
18. Each category of taxonomic hierarchy refers to as a unit of ______.
A. systematic
B. identification
C. nomenclature
D. classification
Answer : D
A. systematic
B. identification
C. nomenclature
D. classification
Answer : D
19. Which of the following is less general in characters as compared to genus?
A. Species
B. Division
C. Class
D. Family
Answer : A
A. Species
B. Division
C. Class
D. Family
Answer : A
20. Which of the following statement regarding growth is incorrect?
A. In animals growth is seen up to a certain age.
B. Increase in body mass is considered as growth.
C. Growth by cell division occurs continuously throughout their life span in animals.
D. Increase in mass and number of individuals is the characteristics feature of animal growth.
Answer : C
A. In animals growth is seen up to a certain age.
B. Increase in body mass is considered as growth.
C. Growth by cell division occurs continuously throughout their life span in animals.
D. Increase in mass and number of individuals is the characteristics feature of animal growth.
Answer : C
21. The taxonomic unit phylum in the classification of animals is equivalent to which hierarchial level in classification of plants ?
A. Class
B. Order
C. Division
D. Family
Answer : C
A. Class
B. Order
C. Division
D. Family
Answer : C
22. In multicellular organisms, _____ refers to the production of progeny possessing features more or less similar to those of parents.
A. growth
B. reproduction
C. metabolism
D. consciousness
Answer : B
A. growth
B. reproduction
C. metabolism
D. consciousness
Answer : B
23. Study the following statements and select the correct description of botanical garden.
(i) Plant species are grown for identification purposes.
(ii) Labeling of each plant consists of its botanical name/ scientific name and its family.
(iii) Specimens are preserved in the jars and containers.
(iv) It is a type of store house which contains dried, pressed and preserved plant specimens on sheet.
(v) Plant specimen contains a labeling of information about date and place of collection.
A. (i) and (ii) only
B. (i), (ii) and (iii) only
C. (ii) and (iv) only
D. All the five statements.
Answer : A
(i) Plant species are grown for identification purposes.
(ii) Labeling of each plant consists of its botanical name/ scientific name and its family.
(iii) Specimens are preserved in the jars and containers.
(iv) It is a type of store house which contains dried, pressed and preserved plant specimens on sheet.
(v) Plant specimen contains a labeling of information about date and place of collection.
A. (i) and (ii) only
B. (i), (ii) and (iii) only
C. (ii) and (iv) only
D. All the five statements.
Answer : A
24. Match the taxonomic categories given in column I with their feature given in column II.
A. A - V, B - II, C - IV, D - III, E - I
B. A - III, B - I, C - IV, D - II, E - V
C. A - II, B - I, C - III, D - V, E - IV
D. A - III, B - II, C - IV, D - I, E - V
Answer : C
| Column I | Column II |
|---|---|
| A. Taxon | I. Basic unit of classification |
| B. Species | II. A taxonomic group of any rank |
| C. Phylum | III. Division is the same category in case of plants |
| D. Genus | IV. Identified based on a number of similar characters |
| E. Order | V. Group of related species having more character in common with others species |
A. A - V, B - II, C - IV, D - III, E - I
B. A - III, B - I, C - IV, D - II, E - V
C. A - II, B - I, C - III, D - V, E - IV
D. A - III, B - II, C - IV, D - I, E - V
Answer : C
25. Taxa differs from taxon due to being
A. a higher taxonomic category than taxon.
B. lower taxonomic category than taxon.
C. the plural of taxon.
D. the singular of taxon.
Answer : C
A. a higher taxonomic category than taxon.
B. lower taxonomic category than taxon.
C. the plural of taxon.
D. the singular of taxon.
Answer : C
26. Which of the following organisms is not correctly matched with its particular ?
A. Human beings Sapiens, species
B. Lion Panthera, genus
C. Cats Felidae, genus
D. Datura Solanaceae, family
Answer : C
A. Human beings Sapiens, species
B. Lion Panthera, genus
C. Cats Felidae, genus
D. Datura Solanaceae, family
Answer : C
27. Systematics refers to the
A. identification and classification of plants and animals.
B. nomenclature and identification of plants and animals.
C. diversity of kinds of organisms and their relationship.
D. different kinds of organisms and their classification.
Answer : C
A. identification and classification of plants and animals.
B. nomenclature and identification of plants and animals.
C. diversity of kinds of organisms and their relationship.
D. different kinds of organisms and their classification.
Answer : C
28. The order generally ends with
A. ales
B. aceae
C. eae
D. none of these
Answer : A
A. ales
B. aceae
C. eae
D. none of these
Answer : A
29. In angiosperm, characters of flowers are used in classification because
A. flowers are attractive.
B. flowers are large.
C. character of flowers are conserved.
D. none of the above.
Answer : C
A. flowers are attractive.
B. flowers are large.
C. character of flowers are conserved.
D. none of the above.
Answer : C
30. Which of the following statements regarding growth is incorrect?
A. In plants, growth by cell division is seen only upto a certain stage.
B. Growth exhibited by non-living objects is by accumulation of material on the surface.
C. A multicellular organism grows by cell division.
D. Growth in in vitro culture of unicellular organisms can be observed by counting the number of cells.
Answer : A
A. In plants, growth by cell division is seen only upto a certain stage.
B. Growth exhibited by non-living objects is by accumulation of material on the surface.
C. A multicellular organism grows by cell division.
D. Growth in in vitro culture of unicellular organisms can be observed by counting the number of cells.
Answer : A
31. Taxonomic hierarchy refers to
A. step-wise arrangement of all categories for classification of plants and animals.
B. a group of senior taxonomists who decide the nomenclature of plants and animals.
C. a list of botanists or zoologists who have worked on taxonomy of a species or group.
D. classification of a species based on fossil record.
Answer : A
A. step-wise arrangement of all categories for classification of plants and animals.
B. a group of senior taxonomists who decide the nomenclature of plants and animals.
C. a list of botanists or zoologists who have worked on taxonomy of a species or group.
D. classification of a species based on fossil record.
Answer : A
32. Which of the following aspects is an exclusive characteristic of living things ?
A. Isolated metabolic reactions occur in vitro.
B. Increase in mass from inside only.
C. Perception of events happening in the environment and their memory.
D. Increase in mass by accumulation of material both on surface as well as internally.
Answer : C
A. Isolated metabolic reactions occur in vitro.
B. Increase in mass from inside only.
C. Perception of events happening in the environment and their memory.
D. Increase in mass by accumulation of material both on surface as well as internally.
Answer : C
33. Match the common name given in column I with their taxonomic category order given in column II and choose the correct combination from the options given below.
A. A I, B II, C IV, D III
B. A IV, B III, C II, D I
C. A II, B IV, C I, D III
D. A III, B IV, C II, D I
Answer : B
| Column-I | Column-II |
|---|---|
| (Taxonomic categoryOrder) | (Common name) |
| A. Wheat | I. Primata |
| B. Mango | II. Diptera |
| C. Housefly | III. Sapindales |
| D. Man | IV. Poales |
A. A I, B II, C IV, D III
B. A IV, B III, C II, D I
C. A II, B IV, C I, D III
D. A III, B IV, C II, D I
Answer : B
34. Statement 1 : Taxon and category are different things.
Statement 2 : Category shows hierarchical classification.
A. Statement- 1 and statement-2 are true and statement-2 is a correct explanation for statement -1
B. Statement -1 and Statement -2 are true; statement-2 is not a correct explanation for statement - 1
C. Statement - 1 is true and statement- 2 is false
D. Both the statements are false.
Answer : A
Statement 2 : Category shows hierarchical classification.
A. Statement- 1 and statement-2 are true and statement-2 is a correct explanation for statement -1
B. Statement -1 and Statement -2 are true; statement-2 is not a correct explanation for statement - 1
C. Statement - 1 is true and statement- 2 is false
D. Both the statements are false.
Answer : A
35. The famous botanical garden Kew is located in
A. England
B. Lucknow
C. Berlin
D. Australia
Answer : A
A. England
B. Lucknow
C. Berlin
D. Australia
Answer : A
36. Couplet represents the choice made between two opposite options which results in
A. rejection of both the option.
B. acceptance of both the option.
C. either acceptance or rejection of both the option.
D. acceptance of only one and rejection of the other.
Answer : D
A. rejection of both the option.
B. acceptance of both the option.
C. either acceptance or rejection of both the option.
D. acceptance of only one and rejection of the other.
Answer : D
37. Which one of the following animals is correctly matched with its particular named taxonomic category ?
A. Tiger Tigris, the species
B. Cuttle fish Mollusca, a class
C. Humans Primata, the family
D. Housefly Musca, an order
Answer : A
A. Tiger Tigris, the species
B. Cuttle fish Mollusca, a class
C. Humans Primata, the family
D. Housefly Musca, an order
Answer : A
38. ICBN stands for
A. International Code of Botanical Nomenclature
B. International Congress of Biological Names
C. Indian Code of Botanical Nomenclature
D. Indian Congress of Biological Names
Answer : A
A. International Code of Botanical Nomenclature
B. International Congress of Biological Names
C. Indian Code of Botanical Nomenclature
D. Indian Congress of Biological Names
Answer : A
39. Select the correct statements (i-v) regarding taxonomic categories.
(i) Each step or rank in hierarchy is called taxonomic category.
(ii) Species is a group of individual organisms with fundamental similarities capable of breeding among themselves.
(iii) Taxonomic studies of all unknown organisms have led to the development of common categories like kingdom, phylum or division, class, order, family, genus and species.
(iv) Lower the category, greater is the difficulty of determining the relationship to other taxa at the same level.
A. (i) & (ii) only
B. (ii) & (iv) only
C. (i), (ii) & (iii) only
D. All of the above
Answer : A
(i) Each step or rank in hierarchy is called taxonomic category.
(ii) Species is a group of individual organisms with fundamental similarities capable of breeding among themselves.
(iii) Taxonomic studies of all unknown organisms have led to the development of common categories like kingdom, phylum or division, class, order, family, genus and species.
(iv) Lower the category, greater is the difficulty of determining the relationship to other taxa at the same level.
A. (i) & (ii) only
B. (ii) & (iv) only
C. (i), (ii) & (iii) only
D. All of the above
Answer : A
40. If an organism is in the same class but not in the same family then it may belong to same
A. genus
B. species
C. variety
D. order
Answer : D
A. genus
B. species
C. variety
D. order
Answer : D
41. Which of the following term is used to refer the number of varieties of plants and animals on earth ?
A. Taxonomy
B. Identification
C. Biodiversity
D. Classification
Answer : C
A. Taxonomy
B. Identification
C. Biodiversity
D. Classification
Answer : C
42. Which one of the following is the first step in taxonomy ?
A. Naming
B. Description
C. Identification
D. Classification
Answer : C
A. Naming
B. Description
C. Identification
D. Classification
Answer : C
43. Match column I with column II and choose the correct option.
A. A IV; B III; C V; D II; E I
B. A V; B IV; C II; D I; E III
C. A IV; B V; C II; D I; E III
D. A V; B III; C II; D I; E IV
Answer : B
| Column-I | Column-II |
|---|---|
| A. Family | I. tuberosum |
| B. Kingdom | II. Polymoniales |
| C. Order | III. Solanum |
| D. Species | IV. Plantae |
| E. Genus | V. Solanaceae |
A. A IV; B III; C V; D II; E I
B. A V; B IV; C II; D I; E III
C. A IV; B V; C II; D I; E III
D. A V; B III; C II; D I; E IV
Answer : B
44. Statement 1: Information given on the label of herbarium sheets does not include family.
Statement 2: Families are characterized on the basis of reproductive features of plant species only.
A. Statement 1 and 2 are true and statement 2 is the correct explanation for statement 1.
B. Statement 1 and 2 are true but statement 2 is not a correct explanation for statement 1.
C. Statement 1 is true and statement 2is false.
D. Both the statements are false.
Answer : D
Statement 2: Families are characterized on the basis of reproductive features of plant species only.
A. Statement 1 and 2 are true and statement 2 is the correct explanation for statement 1.
B. Statement 1 and 2 are true but statement 2 is not a correct explanation for statement 1.
C. Statement 1 is true and statement 2is false.
D. Both the statements are false.
Answer : D
45. Which of the following statement(s) is/are correct ?
(i) Classification is the providing of standardize names to the organisms such that a particular organism known by the same all over the world.
(ii) Taxonomy is the correct description of an organism and to recognition in its scientific name.
(iii) The system of naming with two components (binomial nomenclature) is proposed by Carolus Linneaus.
(iv) Zoological names are based on International Code for Zoological Nomenclature (ICZN).
A. Only (i)
B. Both (iii) and (iv)
C. Only (iv)
D. All of these
Answer : B
(i) Classification is the providing of standardize names to the organisms such that a particular organism known by the same all over the world.
(ii) Taxonomy is the correct description of an organism and to recognition in its scientific name.
(iii) The system of naming with two components (binomial nomenclature) is proposed by Carolus Linneaus.
(iv) Zoological names are based on International Code for Zoological Nomenclature (ICZN).
A. Only (i)
B. Both (iii) and (iv)
C. Only (iv)
D. All of these
Answer : B
46. Which one of the following statements is correct about biodiversity ?
A. It is the occurrence of varied type of organisms on earth.
B. Each different kind of plant, animal or organism represents a species.
C. The number of species that are known and described range between 1.71.8 million.
D. All of the above
Answer : D
A. It is the occurrence of varied type of organisms on earth.
B. Each different kind of plant, animal or organism represents a species.
C. The number of species that are known and described range between 1.71.8 million.
D. All of the above
Answer : D
47. The sum total of all the chemical reactions occurring in our body is known as
A. metabolism
B. growth
C. regeneration
D. reproduction
Answer : A
A. metabolism
B. growth
C. regeneration
D. reproduction
Answer : A
48. The most important feature of all living systems is to
A. utilize oxygen to generate energy.
B. replicate the genetic information.
C. produce gametes.
D. utilize solar energy for metabolic activities.
Answer : B
A. utilize oxygen to generate energy.
B. replicate the genetic information.
C. produce gametes.
D. utilize solar energy for metabolic activities.
Answer : B
49. As we go from species to kingdom in a taxonomic hierachy, the number of common characteristics
A. will decrease.
B. will increase.
C. remain same.
D. may increase or decrease.
Answer : A
A. will decrease.
B. will increase.
C. remain same.
D. may increase or decrease.
Answer : A
50. Which of the following statement(s) is/are not correct ?
(i) Reproduction is the production of progeny possessing features dissimilar to their parents.
(ii) The fungi, the filamentous algae, the protonema of mosses, all multiply by budding.
(iii) Many organisms like mules, sterile worker bees do not reproduce.
(iv) Reproduction is not an all-inclusive defining characteristic of living organisms.
A. Only (i)
B. Both (i) and (ii)
C. Both (ii) and (iv)
D. All of these
Answer : B
(i) Reproduction is the production of progeny possessing features dissimilar to their parents.
(ii) The fungi, the filamentous algae, the protonema of mosses, all multiply by budding.
(iii) Many organisms like mules, sterile worker bees do not reproduce.
(iv) Reproduction is not an all-inclusive defining characteristic of living organisms.
A. Only (i)
B. Both (i) and (ii)
C. Both (ii) and (iv)
D. All of these
Answer : B
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