Taxonomy — MCQs Biology – T4Tutorials .PK

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1. Taxonomy is the science of:
(A) Soil composition analysis
(B) Studying photosynthesis
(C) Identification, naming, and classification of organisms
(D) Energy flow in ecosystems

2. Binomial nomenclature was introduced by:
(A) Jean-Baptiste Lamarck
(B) Charles Darwin
(C) Carl Linnaeus
(D) Gregor Mendel

3. In binomial nomenclature, the first part of the name indicates:
(A) Species
(B) Genus
(C) Family
(D) Class

4. The second part of a binomial name represents:
(A) Family
(B) Genus
(C) Species
(D) Order

5. The highest taxonomic rank is:
(A) Species
(B) Domain
(C) Genus
(D) Class

6. The lowest taxonomic rank is:
(A) Order
(B) Genus
(C) Family
(D) Species

7. The five-kingdom classification system was proposed by:
(A) Charles Darwin
(B) Carl Linnaeus
(C) R.H. Whittaker
(D) Ernst Haeckel

8. The three-domain system was proposed by:
(A) Charles Darwin
(B) Carl Linnaeus
(C) Carl Woese
(D) Jean-Baptiste Lamarck

9. The three domains of life are:
(A) Protista, Monera, Fungi
(B) Plantae, Animalia, Fungi
(C) Bacteria, Archaea, Eukarya
(D) Monera, Plantae, Animalia

10. Kingdom Protista includes:
(A) Multicellular animals only
(B) Mostly unicellular eukaryotes
(C) Only fungi
(D) Only bacteria

11. Kingdom Monera includes:
(A) Eukaryotic plants
(B) Prokaryotic organisms
(C) Fungi only
(D) Animals only

12. Fungi are classified under which kingdom?
(A) Protista
(B) Plantae
(C) Fungi
(D) Monera

13. Plants belong to which kingdom?
(A) Plantae
(B) Animalia
(C) Fungi
(D) Protista

14. Animals belong to which kingdom?
(A) Plantae
(B) Animalia
(C) Fungi
(D) Protista

15. A genus comprises:
(A) Only one species
(B) Multiple families
(C) Multiple orders
(D) One or more species that are closely related

16. A family comprises:
(A) Multiple classes
(B) One species only
(C) One or more genera
(D) One order only

17. An order comprises:
(A) Multiple species only
(B) Only one family
(C) One or more families
(D) Only genera

18. A class comprises:
(A) One species only
(B) One or more orders
(C) Multiple genera only
(D) Families only

19. A phylum comprises:
(A) One or more classes
(B) One family only
(C) Multiple species only
(D) Genera only

20. The domain Eukarya includes:
(A) Only bacteria
(B) All eukaryotic organisms
(C) Only archaea
(D) Only viruses

21. A taxon (plural: taxa) refers to:
(A) Only genera
(B) Only species
(C) Any group of organisms at any rank
(D) Only families

22. Hierarchical classification arranges organisms:
(A) By color only
(B) Randomly
(C) From broad to specific categories
(D) By habitat only

23. Dichotomous keys are used for:
(A) Photosynthesis measurement only
(B) Soil testing only
(C) DNA sequencing only
(D) Identification of organisms using sequential choices

24. Homologous characters indicate:
(A) Soil adaptation only
(B) Similar function only
(C) Random traits
(D) Common ancestry

25. Analogous characters indicate:
(A) Random variation only
(B) Same ancestry only
(C) Soil traits only
(D) Similar function but different evolutionary origin

26. A monophyletic group contains:
(A) An ancestor and all its descendants
(B) Only one species
(C) Only unrelated species
(D) Only fossils

27. A paraphyletic group contains:
(A) Only fossils
(B) All descendants
(C) Only one species
(D) An ancestor and some, but not all, descendants

28. A polyphyletic group contains:
(A) Only fossils
(B) All descendants of one ancestor
(C) Only one species
(D) Organisms from different ancestors

29. Molecular taxonomy uses:
(A) Fossil analysis only
(B) Only morphology
(C) DNA, RNA, and protein sequences
(D) Soil composition only

30. Phenetic classification relies on:
(A) Evolutionary relationships only
(B) Overall similarity of organisms
(C) Fossil record only
(D) Soil features only

31. Evolutionary systematics combines:
(A) Morphology and phylogeny
(B) DNA only
(C) Fossils only
(D) Habitat only

32. Cladistics classifies organisms based on:
(A) Shared derived characters (synapomorphies)
(B) Overall similarity
(C) Fossil presence
(D) Habitat alone

33. Synapomorphy refers to:
(A) Soil adaptation
(B) Ancestral character
(C) Random mutation
(D) Shared derived character

34. Symplesiomorphy refers to:
(A) Derived trait
(B) Shared ancestral trait
(C) Random mutation
(D) Fossil-only trait

35. Autapomorphy refers to:
(A) Fossil trait only
(B) Shared ancestral trait
(C) Unique derived trait of a lineage
(D) Random mutation only

36. Polytypic species have:
(A) Only one subspecies
(B) More than one subspecies
(C) Only one individual
(D) Only fossils

37. Monotypic species have:
(A) No recognized subspecies
(B) Multiple subspecies
(C) Only fossils
(D) Only one population

38. The Linnaean hierarchy emphasizes:
(A) Morphological similarity
(B) DNA sequences only
(C) Fossil record only
(D) Habitat only

39. Molecular clocks help in taxonomy by:
(A) Photosynthesis measurement
(B) Soil dating only
(C) Estimating divergence times using genetic differences
(D) Energy calculation

40. Understanding taxonomy is essential for:
(A) Soil testing only
(B) Biodiversity conservation, evolutionary studies, and species identification
(C) Industrial applications only
(D) Energy calculation only

41. Taxonomic ranks help in:
(A) Soil analysis
(B) Organizing biological diversity hierarchically
(C) Photosynthesis measurement
(D) Energy pyramid creation

42. Domain classification is based on:
(A) Habitat only
(B) Cell type, ribosomal RNA sequences, and membrane lipids
(C) Fossil evidence only
(D) Photosynthesis only

43. Kingdom Plantae includes:
(A) Multicellular, photosynthetic eukaryotes
(B) Unicellular eukaryotes
(C) Prokaryotes only
(D) Fungi only

44. Kingdom Animalia includes:
(A) Fungi only
(B) Photosynthetic plants only
(C) Multicellular, heterotrophic eukaryotes
(D) Monera only

45. Kingdom Fungi includes:
(A) Photosynthetic plants only
(B) Multicellular (mostly) heterotrophs with chitin in cell walls
(C) Prokaryotes only
(D) Animals only

46. Kingdom Protista is:
(A) Prokaryotes only
(B) Multicellular animals only
(C) Multicellular plants only
(D) Mostly unicellular eukaryotes

47. Kingdom Monera is:
(A) Plants only
(B) Eukaryotic algae only
(C) Fungi only
(D) Prokaryotic organisms like bacteria and cyanobacteria

48. Taxonomic keys are useful because they:
(A) Allow accurate species identification
(B) Measure soil nutrients
(C) Track energy flow only
(D) Study photosynthesis only

49. Morphological characters are:
(A) DNA sequences only
(B) Physical traits used in classification
(C) Fossil layers only
(D) Soil traits only

50. Molecular systematics enhances taxonomy by:
(A) Soil analysis only
(B) Using genetic data to resolve relationships not clear from morphology
(C) Photosynthesis measurement
(D) Energy flow study only