MCQ Questions for Class 11 Biology: Ch 1 The Living World
1. A group of interbreeding organisms is called a
(a) Genus
(b) Species
(c) Family
(d) Order
► (b) Species
2. In which organism protoplasm and cellular structure is absent
(a) Algae
(b) Virus
(c) Fungi
(d) Bacteria
► (b) Virus
3. Artificial system of classification was first used by
(a) Linnaeus
(b) De Candolle
(c) Pliny the Edler
(d) Bentham and Hooker
► (a) Linnaeus
4. The basic unit of classification is
(a) Species
(b) Phylum
(c) Genus
(d) Family
► (a) Species
5. A species was defined as ‘A population of interbreeding individuals which are reproductively isolated from other populations’ by
(a) J. B. Lamarck
(b) Charles Darwin
(c) Ernst Mayr
(d) Carolus Linnaeus
► (c) Ernst Mayr
6. The Darwin of 20th century is
(a) Aristotle
(b) Ernst Mayr
(c) Carolus Linnaeus
(d) Theophrastus
► (b) Ernst Mayr
7. Binomial nomenclature consists of two names. These are
(a) Family and genus
(b) Genus and species
(c) Species and variety
(d) Order and family
► (b) Genus and species
8. The branch connected with nomenclature, identification and classification is
(a) Ecology
(b) Taxonomy
(c) Physiology
(d) Morphology
► (b) Taxonomy
9. Which of the following is less general in characters as compared to genus?
(a) Species
(b) Family
(c) Class
(d) Division
► (a) Species
10. Binomial nomenclature was introduced by
(a) de Vries
(b) Carlous Linnaeus
(c) Huxley
(d) John Ray
► (b) Carlous Linnaeus
11. What is the difference between the taxonomic categories of division and phylum?
(a) Division is same as kingdom while phylum is more exclusive than division.
(b) Division is more inclusive category.
(c) Division refers to plants whereas phylum refers to animals
(d) Phylum is more inclusive category.
► (c) Division refers to plants whereas phylum refers to animals
12. The term “New Systematics” was introduced by
(a) Bentham and Hooker
(b) Linnaeus
(c) Julian Huxley
(d) A.P. de Candolle
► (c) Julian Huxley
13. Linnaeus evolved a system of nomenclature called
(a) mononomial
(b) vernacular
(c) binomial
(d) polynomial
► (c) binomial
14. In nomenclature,
(a) The genus is written after the species.
(b) Genus and species may not be of the same name.
(c) Both genus and species are printed in italics.
(d) The first letter is capital in both genus and species.
► (c) Both genus and species are printed in italics.
15. All living organisms are linked to one another because
(a) They have common genetic material of the same type.
(b) They share common genetic material but to varying degrees.
(c) All have common cellular organisation.
(d) All of the above.
► (b) They share common genetic material but to varying degrees.
16. Example of interspecific hybrid is
(a) Liger and dog
(b) Tigon and tiger
(c) Cat and lion
(d) Tigon and liger
► (d) Tigon and liger
17. The Father of Zoology is
(a) John Ray
(b) Buffon
(c) Carlous Linnaeus
(d) Aristotle
► (d) Aristotle
18. Phylogenetic classification is based on
(a) utilitarian system
(b) habits
(c) overall similarities
(d) common evolutionary descent
► (d) common evolutionary descent
19. An important criterion for modern day classification is
(a) resemblances in morphology
(b) anatomical and physiological traits
(c) breeding habits
(d) presence or absence of notochord
► (b) anatomical and physiological traits
20. The taxonomic unit ‘Phylum’ in the classification of animals is equivalent to which hierarchical level in classification of plants?
(a) Class
(b) Order
(c) Family
(d) Division
► (d) Division
21. One of the following functions is exhibited only by green plants and not by animals.
(a) Growth
(b) Photosynthesis
(c) Digestion
(d) Response
► (b) Photosynthesis
22. As we go from species to kingdom in a taxonomic hierarchy, the number of common characteristics
(a) Remain same
(b) Will increase
(c) Will decrease
(d) May increase or decrease
► (c) Will decrease
23. In the five-kingdom system of classification, which single kingdom out of the following can include blue green algae, nitrogen-fixing bacteria and methanogenic archaebacteria?
(a) Fungi
(b) Plantae
(c) Protista
(d) Monera
► (d) Monera
24. In a scientific name, the name of the author is printed in
(a) Abbreviated
(b) Capital letters
(c) Bold
(d) Italics
► (a) Abbreviated
25. System of classification used by Linnaeus was
(a) natural system
(b) artificial system
(c) phylogenetic system
(d) asexual system
► (b) artificial system
26. Basic unit or smallest taxon of taxonomy/ classification is
(a) species
(b) kingdom
(c) family
(d) variety
► (a) species
27. “Taxonomy without phylogeny is similar to bones without flesh” is the statement of
(a) Oswald Tippo
(b) John Hutchinson
(c) Takhtajan
(d) Bentham and Hooker
► (c) Takhtajan
28. Systematics refers to the study of
(a) Nomenclature and identification of plants and animals
(b) Different kinds of organisms and their classification
(c) Diversity of kinds of organisms and their relationships
(d) Identification and classification of plants and animals
► (c) Diversity of kinds of organisms and their relationships
29. A taxon is
(a) A type of living organism
(b) A group of related species
(c) A taxonomic group of any ranking
(d) A group of related families
► (c) A taxonomic group of any ranking
30. A group of closely related classes is called
(a) Genus
(b) Phylum
(c) Family
(d) Order
► (b) Phylum
31. Preservative liquid used for storing fleshy organs is
(a) FAA
(b) Ethyl alcohol
(c) Acetic acid
(d) Formalin
► (d) Formalin
32. Binomial nomenclature was given by
(a) Theophrastus
(b) Linnaeus
(c) R. H. Whittaker
(d) Aristotle
► (b) Linnaeus
33. The maintenance of constant temperature inside the body is an example of
(a) Homeostasis
(b) Negative feedback loop
(c) Both A and B
(d) None of these
► (a) Homeostasis
34. The term phylum was given by
(a) Cuvier
(b) Haeckel
(c) Theophrastus
(d) Linnaeus
► (b) Haeckel
35. The highest categories of classification is
(a) Family
(b) Order
(c) Kingdom
(d) Class
► (c) Kingdom